# Electronic Supplementary Material (ESI) for Organic Chemistry Frontiers
# This journal is © The Partner Organisations 2014


data_a

_audit_creation_method           SHELXL-97
_chemical_name_systematic        
; 
 ? 
;
_chemical_name_common            ?
_chemical_melting_point          ?
_chemical_formula_moiety         ?
_chemical_formula_sum            'C21 H22 O2 S'
_chemical_formula_weight         338.45

loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0033 0.0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
H H 0.0000 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
O O 0.0106 0.0060 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
S S 0.1246 0.1234 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'

_symmetry_cell_setting           triclinic
_symmetry_space_group_name_H-M   P-1

loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x, -y, -z'

_cell_length_a                   8.7371(17)
_cell_length_b                   9.2269(18)
_cell_length_c                   12.186(2)
_cell_angle_alpha                89.90(3)
_cell_angle_beta                 72.14(3)
_cell_angle_gamma                80.18(3)
_cell_volume                     920.0(3)
_cell_formula_units_Z            2
_cell_measurement_temperature    293(2)
_cell_measurement_reflns_used    7297
_cell_measurement_theta_min      1.76
_cell_measurement_theta_max      27.48

_exptl_crystal_description       block
_exptl_crystal_colour            colourless
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.50
_exptl_crystal_size_min          0.40
_exptl_crystal_density_meas      ?
_exptl_crystal_density_diffrn    1.222
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             360
_exptl_absorpt_coefficient_mu    0.185
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_correction_T_min  0.912
_exptl_absorpt_correction_T_max  0.929
_exptl_absorpt_process_details   
; 
                                  HIGASHI, T. (1995). Abscor-Empirical
                                  Absorption Correction based on Fourier
                                  Series Approximation.
                                  Rigaku Corporation,Tokyo,Japan.
;

_diffrn_ambient_temperature      293(2)
_diffrn_radiation_wavelength     0.71073
_diffrn_radiation_type           MoK\a
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_monochromator  graphite
_diffrn_measurement_device_type  'Rigaku RAXIS RAPID IP'
_diffrn_measurement_method       \W
_diffrn_detector_area_resol_mean 10.00
_diffrn_standards_number         0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_decay_%        0
_diffrn_reflns_number            7297
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0595
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_theta_min         1.76
_diffrn_reflns_theta_max         27.48
_reflns_number_total             3976
_reflns_number_gt                2355
_reflns_threshold_expression     >2sigma(I)

_computing_data_collection       'Rapid-AUTO (Rigaku,2000)'
_computing_cell_refinement       Rapid-AUTO
_computing_data_reduction        'CrystalStructure (Rigaku/MSC,2000)'
_computing_structure_solution    SHELXS-97,(Sheldrick,1997)
_computing_structure_refinement  SHELXL-97,(Sheldrick,1997)
_computing_molecular_graphics    'Siemens SHELXTL V4.2,(Sheldrick,1990)'
_computing_publication_material  SHELXL-97,(Sheldrick,1997)

_refine_special_details          
; 
 Refinement of F^2^ against ALL reflections.  The weighted R-factor wR and 
 goodness of fit S are based on F^2^, conventional R-factors R are based 
 on F, with F set to zero for negative F^2^. The threshold expression of 
 F^2^ > 2sigma(F^2^) is used only for calculating R-factors(gt) etc. and is 
 not relevant to the choice of reflections for refinement.  R-factors based 
 on F^2^ are statistically about twice as large as those based on F, and R- 
 factors based on ALL data will be even larger. 
;

_refine_ls_structure_factor_coef Fsqd
_refine_ls_matrix_type           full
_refine_ls_weighting_scheme      calc
_refine_ls_weighting_details     
'calc w=1/[\s^2^(Fo^2^)+(0.0650P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_atom_sites_solution_hydrogens   'geom or difmap'
_refine_ls_hydrogen_treatment    mixed
_refine_ls_extinction_method     SHELXL
_refine_ls_extinction_coef       0.248(11)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_number_reflns         3976
_refine_ls_number_parameters     226
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0909
_refine_ls_R_factor_gt           0.0533
_refine_ls_wR_factor_ref         0.1360
_refine_ls_wR_factor_gt          0.1242
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_restrained_S_all      1.052
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000

loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
_atom_site_symmetry_multiplicity
_atom_site_calc_flag
_atom_site_refinement_flags
_atom_site_disorder_assembly
_atom_site_disorder_group
S1 S 0.08031(7) 0.70266(7) 0.47984(5) 0.0530(2) Uani 1 1 d . . .
O1 O 0.80084(19) 0.55132(19) 0.11424(15) 0.0562(5) Uani 1 1 d . . .
HO1 H 0.822(3) 0.476(3) 0.070(2) 0.076(9) Uiso 1 1 d . . .
O2 O 0.8980(2) 0.3265(2) -0.04062(17) 0.0726(6) Uani 1 1 d . . .
HO2 H 1.003(5) 0.338(4) -0.079(3) 0.126(14) Uiso 1 1 d . . .
C1 C 0.7234(3) 0.8859(3) 0.3444(2) 0.0560(6) Uani 1 1 d . . .
H1 H 0.6985 0.8503 0.4181 0.067 Uiso 1 1 calc R . .
C2 C 0.7930(4) 1.0111(3) 0.3225(3) 0.0724(8) Uani 1 1 d . . .
H2 H 0.8136 1.0595 0.3819 0.087 Uiso 1 1 calc R . .
C3 C 0.8316(3) 1.0644(3) 0.2145(3) 0.0691(8) Uani 1 1 d . . .
H3 H 0.8809 1.1472 0.2004 0.083 Uiso 1 1 calc R . .
C4 C 0.7977(3) 0.9958(3) 0.1265(3) 0.0633(7) Uani 1 1 d . . .
H4 H 0.8216 1.0334 0.0535 0.076 Uiso 1 1 calc R . .
C5 C 0.7274(3) 0.8693(2) 0.1477(2) 0.0504(6) Uani 1 1 d . . .
H5 H 0.7050 0.8225 0.0883 0.061 Uiso 1 1 calc R . .
C6 C 0.6905(2) 0.8129(2) 0.25669(19) 0.0406(5) Uani 1 1 d . . .
C7 C 0.6105(2) 0.6808(2) 0.28198(17) 0.0381(5) Uani 1 1 d . . .
C8 C 0.6666(2) 0.5538(2) 0.20820(18) 0.0411(5) Uani 1 1 d . . .
C9 C 0.5849(3) 0.4354(2) 0.2335(2) 0.0473(6) Uani 1 1 d . . .
H9 H 0.6221 0.3509 0.1846 0.057 Uiso 1 1 calc R . .
C10 C 0.4497(3) 0.4406(2) 0.3296(2) 0.0478(6) Uani 1 1 d . . .
H10 H 0.3969 0.3600 0.3444 0.057 Uiso 1 1 calc R . .
C11 C 0.3921(3) 0.5640(2) 0.40382(19) 0.0427(5) Uani 1 1 d . . .
C12 C 0.4753(2) 0.6817(2) 0.37852(18) 0.0417(5) Uani 1 1 d . . .
H12 H 0.4386 0.7649 0.4287 0.050 Uiso 1 1 calc R . .
C13 C 0.2426(3) 0.5738(3) 0.50754(19) 0.0484(6) Uani 1 1 d . . .
H13A H 0.2648 0.6073 0.5756 0.058 Uiso 1 1 calc R . .
H13B H 0.2113 0.4778 0.5208 0.058 Uiso 1 1 calc R . .
C14 C -0.0621(3) 0.7480(2) 0.61804(19) 0.0441(5) Uani 1 1 d . . .
C15 C -0.0732(3) 0.6646(3) 0.7140(2) 0.0538(6) Uani 1 1 d . . .
H15 H -0.0005 0.5765 0.7077 0.065 Uiso 1 1 calc R . .
C16 C -0.1897(3) 0.7097(3) 0.8183(2) 0.0643(7) Uani 1 1 d . . .
H16 H -0.1941 0.6531 0.8820 0.077 Uiso 1 1 calc R . .
C17 C -0.2988(4) 0.8374(4) 0.8283(3) 0.0752(9) Uani 1 1 d . . .
H17 H -0.3789 0.8675 0.8985 0.090 Uiso 1 1 calc R . .
C18 C -0.2894(4) 0.9213(3) 0.7341(3) 0.0736(8) Uani 1 1 d . . .
H18 H -0.3634 1.0086 0.7408 0.088 Uiso 1 1 calc R . .
C19 C -0.1716(3) 0.8776(3) 0.6298(2) 0.0576(6) Uani 1 1 d . . .
H19 H -0.1660 0.9360 0.5669 0.069 Uiso 1 1 calc R . .
C20 C 0.8410(4) 0.2877(3) -0.1331(3) 0.0755(8) Uani 1 1 d . . .
H20A H 0.8918 0.1878 -0.1628 0.091 Uiso 1 1 calc R . .
H20B H 0.8704 0.3533 -0.1955 0.091 Uiso 1 1 calc R . .
C21 C 0.6654(4) 0.2991(4) -0.0911(3) 0.1042(12) Uani 1 1 d . . .
H21A H 0.6270 0.2728 -0.1528 0.156 Uiso 1 1 calc R . .
H21B H 0.6157 0.3985 -0.0628 0.156 Uiso 1 1 calc R . .
H21C H 0.6371 0.2337 -0.0297 0.156 Uiso 1 1 calc R . .

loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_23
_atom_site_aniso_U_13
_atom_site_aniso_U_12
S1 0.0477(4) 0.0647(4) 0.0452(4) 0.0078(3) -0.0120(3) -0.0108(3)
O1 0.0485(10) 0.0512(10) 0.0581(11) -0.0160(9) 0.0027(8) -0.0158(8)
O2 0.0477(11) 0.0852(14) 0.0770(13) -0.0337(11) -0.0067(10) -0.0141(9)
C1 0.0680(16) 0.0514(14) 0.0553(14) -0.0002(12) -0.0203(12) -0.0267(12)
C2 0.085(2) 0.0549(17) 0.088(2) -0.0080(15) -0.0304(17) -0.0333(15)
C3 0.0648(17) 0.0431(15) 0.100(2) 0.0077(15) -0.0188(16) -0.0230(13)
C4 0.0574(16) 0.0537(16) 0.0743(18) 0.0215(14) -0.0117(14) -0.0141(12)
C5 0.0447(13) 0.0485(14) 0.0557(15) 0.0008(11) -0.0117(11) -0.0095(10)
C6 0.0358(11) 0.0378(12) 0.0478(13) -0.0015(10) -0.0103(10) -0.0105(9)
C7 0.0378(12) 0.0383(12) 0.0420(12) -0.0009(9) -0.0150(9) -0.0121(9)
C8 0.0368(12) 0.0434(12) 0.0434(12) -0.0046(10) -0.0114(10) -0.0101(9)
C9 0.0485(13) 0.0382(12) 0.0556(14) -0.0073(10) -0.0151(11) -0.0111(10)
C10 0.0476(13) 0.0409(13) 0.0609(15) 0.0039(11) -0.0203(11) -0.0177(10)
C11 0.0397(12) 0.0426(13) 0.0486(13) 0.0045(10) -0.0148(10) -0.0133(10)
C12 0.0425(12) 0.0409(12) 0.0421(12) -0.0044(10) -0.0121(10) -0.0101(10)
C13 0.0447(13) 0.0522(14) 0.0475(13) 0.0083(11) -0.0101(10) -0.0143(11)
C14 0.0408(12) 0.0482(13) 0.0467(13) 0.0011(11) -0.0135(10) -0.0171(10)
C15 0.0567(15) 0.0519(14) 0.0533(15) 0.0087(12) -0.0136(12) -0.0180(12)
C16 0.0713(18) 0.0752(19) 0.0462(14) 0.0078(13) -0.0116(13) -0.0250(15)
C17 0.0617(18) 0.092(2) 0.0606(18) -0.0186(17) -0.0022(14) -0.0146(17)
C18 0.0686(19) 0.0707(19) 0.073(2) -0.0104(16) -0.0198(16) 0.0074(15)
C19 0.0593(16) 0.0571(15) 0.0571(15) 0.0052(13) -0.0195(13) -0.0097(12)
C20 0.085(2) 0.077(2) 0.0650(18) -0.0041(15) -0.0195(16) -0.0221(16)
C21 0.078(2) 0.124(3) 0.123(3) -0.011(2) -0.055(2) -0.007(2)

_geom_special_details            
; 
 All esds (except the esd in the dihedral angle between two l.s. planes) 
 are estimated using the full covariance matrix.  The cell esds are taken 
 into account individually in the estimation of esds in distances, angles 
 and torsion angles; correlations between esds in cell parameters are only 
 used when they are defined by crystal symmetry.  An approximate (isotropic) 
 treatment of cell esds is used for estimating esds involving l.s. planes. 
;

loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
_geom_bond_publ_flag
S1 C14 1.760(2) . ?
S1 C13 1.804(2) . ?
O1 C8 1.362(2) . ?
O1 HO1 0.84(3) . ?
O2 C20 1.433(3) . ?
O2 HO2 0.92(4) . ?
C1 C2 1.383(3) . ?
C1 C6 1.391(3) . ?
C1 H1 0.9300 . ?
C2 C3 1.368(4) . ?
C2 H2 0.9300 . ?
C3 C4 1.378(4) . ?
C3 H3 0.9300 . ?
C4 C5 1.397(3) . ?
C4 H4 0.9300 . ?
C5 C6 1.389(3) . ?
C5 H5 0.9300 . ?
C6 C7 1.493(3) . ?
C7 C12 1.387(3) . ?
C7 C8 1.400(3) . ?
C8 C9 1.388(3) . ?
C9 C10 1.379(3) . ?
C9 H9 0.9300 . ?
C10 C11 1.378(3) . ?
C10 H10 0.9300 . ?
C11 C12 1.390(3) . ?
C11 C13 1.503(3) . ?
C12 H12 0.9300 . ?
C13 H13A 0.9700 . ?
C13 H13B 0.9700 . ?
C14 C19 1.376(3) . ?
C14 C15 1.386(3) . ?
C15 C16 1.374(3) . ?
C15 H15 0.9300 . ?
C16 C17 1.363(4) . ?
C16 H16 0.9300 . ?
C17 C18 1.373(4) . ?
C17 H17 0.9300 . ?
C18 C19 1.377(4) . ?
C18 H18 0.9300 . ?
C19 H19 0.9300 . ?
C20 C21 1.446(4) . ?
C20 H20A 0.9700 . ?
C20 H20B 0.9700 . ?
C21 H21A 0.9600 . ?
C21 H21B 0.9600 . ?
C21 H21C 0.9600 . ?

loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_3
_geom_angle_publ_flag
C14 S1 C13 103.45(11) . . ?
C8 O1 HO1 113.4(19) . . ?
C20 O2 HO2 102(2) . . ?
C2 C1 C6 120.3(2) . . ?
C2 C1 H1 119.8 . . ?
C6 C1 H1 119.8 . . ?
C3 C2 C1 120.7(3) . . ?
C3 C2 H2 119.6 . . ?
C1 C2 H2 119.6 . . ?
C2 C3 C4 120.2(2) . . ?
C2 C3 H3 119.9 . . ?
C4 C3 H3 119.9 . . ?
C3 C4 C5 119.6(3) . . ?
C3 C4 H4 120.2 . . ?
C5 C4 H4 120.2 . . ?
C6 C5 C4 120.6(2) . . ?
C6 C5 H5 119.7 . . ?
C4 C5 H5 119.7 . . ?
C5 C6 C1 118.6(2) . . ?
C5 C6 C7 121.4(2) . . ?
C1 C6 C7 119.9(2) . . ?
C12 C7 C8 117.94(18) . . ?
C12 C7 C6 120.70(18) . . ?
C8 C7 C6 121.35(18) . . ?
O1 C8 C9 122.52(19) . . ?
O1 C8 C7 118.24(19) . . ?
C9 C8 C7 119.24(19) . . ?
C10 C9 C8 121.3(2) . . ?
C10 C9 H9 119.3 . . ?
C8 C9 H9 119.3 . . ?
C11 C10 C9 120.7(2) . . ?
C11 C10 H10 119.7 . . ?
C9 C10 H10 119.7 . . ?
C10 C11 C12 117.7(2) . . ?
C10 C11 C13 121.7(2) . . ?
C12 C11 C13 120.63(19) . . ?
C7 C12 C11 123.14(19) . . ?
C7 C12 H12 118.4 . . ?
C11 C12 H12 118.4 . . ?
C11 C13 S1 107.92(15) . . ?
C11 C13 H13A 110.1 . . ?
S1 C13 H13A 110.1 . . ?
C11 C13 H13B 110.1 . . ?
S1 C13 H13B 110.1 . . ?
H13A C13 H13B 108.4 . . ?
C19 C14 C15 118.1(2) . . ?
C19 C14 S1 116.08(18) . . ?
C15 C14 S1 125.82(19) . . ?
C16 C15 C14 121.3(2) . . ?
C16 C15 H15 119.4 . . ?
C14 C15 H15 119.4 . . ?
C17 C16 C15 120.0(3) . . ?
C17 C16 H16 120.0 . . ?
C15 C16 H16 120.0 . . ?
C16 C17 C18 119.5(3) . . ?
C16 C17 H17 120.3 . . ?
C18 C17 H17 120.3 . . ?
C19 C18 C17 120.8(3) . . ?
C19 C18 H18 119.6 . . ?
C17 C18 H18 119.6 . . ?
C18 C19 C14 120.4(2) . . ?
C18 C19 H19 119.8 . . ?
C14 C19 H19 119.8 . . ?
O2 C20 C21 109.3(3) . . ?
O2 C20 H20A 109.8 . . ?
C21 C20 H20A 109.8 . . ?
O2 C20 H20B 109.8 . . ?
C21 C20 H20B 109.8 . . ?
H20A C20 H20B 108.3 . . ?
C20 C21 H21A 109.5 . . ?
C20 C21 H21B 109.5 . . ?
H21A C21 H21B 109.5 . . ?
C20 C21 H21C 109.5 . . ?
H21A C21 H21C 109.5 . . ?
H21B C21 H21C 109.5 . . ?

loop_
_geom_torsion_atom_site_label_1
_geom_torsion_atom_site_label_2
_geom_torsion_atom_site_label_3
_geom_torsion_atom_site_label_4
_geom_torsion
_geom_torsion_site_symmetry_1
_geom_torsion_site_symmetry_2
_geom_torsion_site_symmetry_3
_geom_torsion_site_symmetry_4
_geom_torsion_publ_flag
C6 C1 C2 C3 -0.5(4) . . . . ?
C1 C2 C3 C4 1.7(4) . . . . ?
C2 C3 C4 C5 -1.6(4) . . . . ?
C3 C4 C5 C6 0.4(4) . . . . ?
C4 C5 C6 C1 0.7(3) . . . . ?
C4 C5 C6 C7 178.0(2) . . . . ?
C2 C1 C6 C5 -0.7(4) . . . . ?
C2 C1 C6 C7 -178.0(2) . . . . ?
C5 C6 C7 C12 -131.2(2) . . . . ?
C1 C6 C7 C12 46.0(3) . . . . ?
C5 C6 C7 C8 47.3(3) . . . . ?
C1 C6 C7 C8 -135.4(2) . . . . ?
C12 C7 C8 O1 -178.94(19) . . . . ?
C6 C7 C8 O1 2.5(3) . . . . ?
C12 C7 C8 C9 0.6(3) . . . . ?
C6 C7 C8 C9 -178.0(2) . . . . ?
O1 C8 C9 C10 179.6(2) . . . . ?
C7 C8 C9 C10 0.1(3) . . . . ?
C8 C9 C10 C11 -0.3(3) . . . . ?
C9 C10 C11 C12 -0.3(3) . . . . ?
C9 C10 C11 C13 178.5(2) . . . . ?
C8 C7 C12 C11 -1.2(3) . . . . ?
C6 C7 C12 C11 177.4(2) . . . . ?
C10 C11 C12 C7 1.1(3) . . . . ?
C13 C11 C12 C7 -177.7(2) . . . . ?
C10 C11 C13 S1 -108.6(2) . . . . ?
C12 C11 C13 S1 70.1(2) . . . . ?
C14 S1 C13 C11 -162.40(15) . . . . ?
C13 S1 C14 C19 159.39(18) . . . . ?
C13 S1 C14 C15 -21.1(2) . . . . ?
C19 C14 C15 C16 -0.2(3) . . . . ?
S1 C14 C15 C16 -179.75(18) . . . . ?
C14 C15 C16 C17 1.1(4) . . . . ?
C15 C16 C17 C18 -1.0(4) . . . . ?
C16 C17 C18 C19 0.2(4) . . . . ?
C17 C18 C19 C14 0.7(4) . . . . ?
C15 C14 C19 C18 -0.6(3) . . . . ?
S1 C14 C19 C18 178.9(2) . . . . ?

loop_
_geom_hbond_atom_site_label_D
_geom_hbond_atom_site_label_H
_geom_hbond_atom_site_label_A
_geom_hbond_distance_DH
_geom_hbond_distance_HA
_geom_hbond_distance_DA
_geom_hbond_angle_DHA
_geom_hbond_site_symmetry_A
O1 HO1 O2 0.84(3) 1.82(3) 2.649(3) 170(3) .
O2 HO2 O1 0.92(4) 2.07(4) 2.926(3) 154(3) 2_765

_diffrn_measured_fraction_theta_max 0.946
_diffrn_reflns_theta_full        27.48
_diffrn_measured_fraction_theta_full 0.946
_refine_diff_density_max         0.259
_refine_diff_density_min         -0.266
_refine_diff_density_rms         0.050
_database_code_depnum_ccdc_archive 'CCDC 969849'