# Electronic Supplementary Material (ESI) for ChemComm.
# This journal is © The Royal Society of Chemistry 2018

####################################################################### 
# 
# This file contains crystal structure data downloaded from the 
# Cambridge Structural Database (CSD) hosted by the Cambridge 
# Crystallographic Data Centre (CCDC).
# 
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# guidelines are available at http://www.ccdc.cam.ac.uk/access/V1 
# 
# Audit and citation data items may have been added by the CCDC. 
# Please retain this information to preserve the provenance of 
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data_p212121_a
_database_code_depnum_ccdc_archive 'CCDC 1571159'
_audit_update_record             
;
2017-08-28 deposited with the CCDC.
2018-01-08 downloaded from the CCDC.
;
_audit_creation_date             2017-08-28
_audit_creation_method           
;
Olex2 1.2
(compiled 2017.08.10 svn.r3458 for OlexSys, GUI svn.r5375)
;
_shelx_SHELXL_version_number     2014/7
_chemical_name_common            YQZ-132-A
_chemical_name_systematic        
(3S,4a'R,5a'S)-6-methoxy-1'-methyl-4',4a',5',5a',7',8'-hexahydro-3'H,10'H-spiro[indoline-3,6'-pyrano[3,4-f]indolizine]-2,10'-dione
_chemical_formula_moiety         'C20 H22 N2 O4'
_chemical_formula_sum            'C20 H22 N2 O4'
_chemical_formula_weight         354.39
_chemical_absolute_configuration ad
_chemical_melting_point          N/A
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0181 0.0091 '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'
N N 0.0311 0.0180 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
O O 0.0492 0.0322 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'

_shelx_space_group_comment       
;
The symmetry employed for this shelxl refinement is uniquely defined
by the following loop, which should always be used as a source of
symmetry information in preference to the above space-group names.
They are only intended as comments.
;
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_H-M_alt        'P 21 21 21'
_space_group_name_Hall           'P 2ac 2ab'
loop_
_space_group_symop_operation_xyz
'x, y, z'
'-x+1/2, -y, z+1/2'
'-x, y+1/2, -z+1/2'
'x+1/2, -y+1/2, -z'

_cell_length_a                   6.4100(4)
_cell_length_b                   12.0057(9)
_cell_length_c                   22.2391(15)
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_volume                     1711.4(2)
_cell_formula_units_Z            4
_cell_measurement_reflns_used    9980
_cell_measurement_temperature    170
_cell_measurement_theta_max      68.21
_cell_measurement_theta_min      3.68
_shelx_estimated_absorpt_T_max   ?
_shelx_estimated_absorpt_T_min   ?
_exptl_absorpt_coefficient_mu    0.789
_exptl_absorpt_correction_T_max  0.7531
_exptl_absorpt_correction_T_min  0.6596
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.1006 before and 0.0397 after correction. The Ratio of minimum to maximum transmission is 0.8758. The λ/2 correction factor is Not present.'
_exptl_absorpt_special_details   ?
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.375
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    ?
_exptl_crystal_description       block
_exptl_crystal_F_000             752
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.3
_exptl_transmission_factor_max   ?
_exptl_transmission_factor_min   ?
_diffrn_reflns_av_R_equivalents  0.0246
_diffrn_reflns_av_unetI/netI     0.0218
_diffrn_reflns_Laue_measured_fraction_full 0.986
_diffrn_reflns_Laue_measured_fraction_max 0.986
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            10789
_diffrn_reflns_point_group_measured_fraction_full 0.989
_diffrn_reflns_point_group_measured_fraction_max 0.989
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         68.200
_diffrn_reflns_theta_min         7.020
_diffrn_ambient_temperature      170.0
_diffrn_detector_area_resol_mean ?
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       'φ and ω scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_source                   ?
_reflns_Friedel_coverage         0.716
_reflns_Friedel_fraction_full    0.992
_reflns_Friedel_fraction_max     0.992
_reflns_number_gt                3082
_reflns_number_total             3106
_reflns_special_details          
;
 Reflections were merged by SHELXL according to the crystal
 class for the calculation of statistics and refinement.
 
 _reflns_Friedel_fraction is defined as the number of unique
 Friedel pairs measured divided by the number that would be
 possible theoretically, ignoring centric projections and
 systematic absences.
;
_reflns_threshold_expression     'I > 2σ(I)'
_computing_cell_refinement       'SAINT v8.37A (Bruker, 2015)'
_computing_data_collection       ?
_computing_data_reduction        'SAINT v8.37A (Bruker, 2015)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_refine_diff_density_max         0.182
_refine_diff_density_min         -0.159
_refine_diff_density_rms         0.036
_refine_ls_abs_structure_details 
;
 Flack x determined using 1280 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.03(5)
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.089
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     237
_refine_ls_number_reflns         3106
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0313
_refine_ls_R_factor_gt           0.0311
_refine_ls_restrained_S_all      1.089
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details     
'w=1/[σ²(Fo²)+(0.0463P)²+0.3085P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0817
_refine_ls_wR_factor_ref         0.0819
_refine_special_details          ?
_olex2_refinement_description    
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C12(H12), C14(H14)
2.b Secondary CH2 refined with riding coordinates:
 C10(H10A,H10B), C11(H11A,H11B), C13(H13A,H13B), C15(H15A,H15B), C16(H16A,H16B)
2.c Aromatic/amide H refined with riding coordinates:
 N2(H2), C3(H3), C6(H6), C7(H7)
2.d Idealised Me refined as rotating group:
 C1(H1A,H1B,H1C), C17(H17A,H17B,H17C)
;
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   ?
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_site_symmetry_order
_atom_site_calc_flag
_atom_site_refinement_flags_posn
_atom_site_refinement_flags_adp
_atom_site_refinement_flags_occupancy
_atom_site_disorder_assembly
_atom_site_disorder_group
O1 O 0.9583(2) 0.76664(13) 0.75170(7) 0.0383(4) Uani 1 1 d . . . . .
O2 O 0.3687(3) 0.42782(11) 0.59943(6) 0.0386(4) Uani 1 1 d . . . . .
O3 O -0.0154(2) 0.69629(12) 0.53964(7) 0.0368(3) Uani 1 1 d . . . . .
O4 O 0.0825(3) 0.57946(14) 0.92112(7) 0.0469(4) Uani 1 1 d . . . . .
N2 N 0.7050(3) 0.74007(13) 0.82365(7) 0.0303(4) Uani 1 1 d . . . . .
H2 H 0.7410 0.7937 0.8485 0.036 Uiso 1 1 calc R . . . .
N3 N 0.5691(3) 0.54972(13) 0.64929(7) 0.0276(4) Uani 1 1 d . . . . .
C1 C 0.0509(5) 0.6703(2) 0.96007(11) 0.0513(6) Uani 1 1 d . . . . .
H1A H 0.0297 0.7382 0.9364 0.077 Uiso 1 1 calc GR . . . .
H1B H 0.1734 0.6795 0.9860 0.077 Uiso 1 1 calc GR . . . .
H1C H -0.0725 0.6565 0.9850 0.077 Uiso 1 1 calc GR . . . .
C2 C 0.2351(3) 0.58931(17) 0.87802(9) 0.0340(4) Uani 1 1 d . . . . .
C3 C 0.3923(4) 0.67002(17) 0.87957(8) 0.0328(4) Uani 1 1 d . . . . .
H3 H 0.4013 0.7231 0.9111 0.039 Uiso 1 1 calc R . . . .
C4 C 0.5340(3) 0.66841(15) 0.83267(8) 0.0267(4) Uani 1 1 d . . . . .
C5 C 0.5224(3) 0.59310(15) 0.78521(8) 0.0242(4) Uani 1 1 d . . . . .
C6 C 0.3657(3) 0.51446(15) 0.78525(8) 0.0279(4) Uani 1 1 d . . . . .
H6 H 0.3548 0.4624 0.7532 0.034 Uiso 1 1 calc R . . . .
C7 C 0.2242(3) 0.51188(17) 0.83226(9) 0.0332(4) Uani 1 1 d . . . . .
H7 H 0.1187 0.4563 0.8330 0.040 Uiso 1 1 calc R . . . .
C8 C 0.8077(3) 0.71606(16) 0.77166(9) 0.0278(4) Uani 1 1 d . . . . .
C9 C 0.6946(3) 0.61890(14) 0.74121(8) 0.0250(4) Uani 1 1 d . . . . .
C10 C 0.8311(3) 0.51910(17) 0.72252(9) 0.0326(4) Uani 1 1 d . . . . .
H10A H 0.9668 0.5445 0.7063 0.039 Uiso 1 1 calc R . . . .
H10B H 0.8565 0.4689 0.7571 0.039 Uiso 1 1 calc R . . . .
C11 C 0.7023(3) 0.46089(17) 0.67401(9) 0.0343(5) Uani 1 1 d . . . . .
H11A H 0.7936 0.4292 0.6425 0.041 Uiso 1 1 calc R . . . .
H11B H 0.6167 0.4004 0.6915 0.041 Uiso 1 1 calc R . . . .
C12 C 0.6152(3) 0.65696(15) 0.67849(8) 0.0246(4) Uani 1 1 d . . . . .
H12 H 0.7334 0.6931 0.6566 0.029 Uiso 1 1 calc R . . . .
C13 C 0.4298(3) 0.73366(14) 0.67632(8) 0.0239(4) Uani 1 1 d . . . . .
H13A H 0.4711 0.8091 0.6898 0.029 Uiso 1 1 calc R . . . .
H13B H 0.3194 0.7059 0.7036 0.029 Uiso 1 1 calc R . . . .
C14 C 0.3476(3) 0.73874(15) 0.61222(8) 0.0240(4) Uani 1 1 d . . . . .
H14 H 0.4625 0.7640 0.5850 0.029 Uiso 1 1 calc R . . . .
C15 C 0.1675(3) 0.82073(16) 0.60767(8) 0.0286(4) Uani 1 1 d . . . . .
H15A H 0.0669 0.8067 0.6406 0.034 Uiso 1 1 calc R . . . .
H15B H 0.2209 0.8977 0.6121 0.034 Uiso 1 1 calc R . . . .
C16 C 0.0593(3) 0.80892(17) 0.54816(9) 0.0325(4) Uani 1 1 d . . . . .
H16A H -0.0597 0.8613 0.5463 0.039 Uiso 1 1 calc R . . . .
H16B H 0.1574 0.8283 0.5154 0.039 Uiso 1 1 calc R . . . .
C17 C 0.0100(4) 0.50457(19) 0.53490(11) 0.0431(5) Uani 1 1 d . . . . .
H17A H -0.1412 0.5061 0.5412 0.065 Uiso 1 1 calc GR . . . .
H17B H 0.0698 0.4404 0.5560 0.065 Uiso 1 1 calc GR . . . .
H17C H 0.0396 0.4985 0.4918 0.065 Uiso 1 1 calc GR . . . .
C18 C 0.1049(3) 0.60983(17) 0.55896(8) 0.0302(4) Uani 1 1 d . . . . .
C19 C 0.2774(3) 0.62307(15) 0.59286(8) 0.0248(4) Uani 1 1 d . . . . .
C20 C 0.4038(3) 0.52694(16) 0.61341(8) 0.0274(4) Uani 1 1 d . . . . .


_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
O1 C8 1.224(2) . ?
O2 C20 1.250(2) . ?
O3 C16 1.447(3) . ?
O3 C18 1.363(2) . ?
O4 C1 1.407(3) . ?
O4 C2 1.375(2) . ?
N2 H2 0.8800 . ?
N2 C4 1.408(2) . ?
N2 C8 1.361(3) . ?
N3 C11 1.473(2) . ?
N3 C12 1.472(2) . ?
N3 C20 1.354(3) . ?
C1 H1A 0.9800 . ?
C1 H1B 0.9800 . ?
C1 H1C 0.9800 . ?
C2 C3 1.399(3) . ?
C2 C7 1.380(3) . ?
C3 H3 0.9500 . ?
C3 C4 1.383(3) . ?
C4 C5 1.392(3) . ?
C5 C6 1.379(3) . ?
C5 C9 1.507(3) . ?
C6 H6 0.9500 . ?
C6 C7 1.384(3) . ?
C7 H7 0.9500 . ?
C8 C9 1.531(3) . ?
C9 C10 1.541(3) . ?
C9 C12 1.553(2) . ?
C10 H10A 0.9900 . ?
C10 H10B 0.9900 . ?
C10 C11 1.528(3) . ?
C11 H11A 0.9900 . ?
C11 H11B 0.9900 . ?
C12 H12 1.0000 . ?
C12 C13 1.504(2) . ?
C13 H13A 0.9900 . ?
C13 H13B 0.9900 . ?
C13 C14 1.521(2) . ?
C14 H14 1.0000 . ?
C14 C15 1.520(2) . ?
C14 C19 1.522(2) . ?
C15 H15A 0.9900 . ?
C15 H15B 0.9900 . ?
C15 C16 1.501(3) . ?
C16 H16A 0.9900 . ?
C16 H16B 0.9900 . ?
C17 H17A 0.9800 . ?
C17 H17B 0.9800 . ?
C17 H17C 0.9800 . ?
C17 C18 1.501(3) . ?
C18 C19 1.347(3) . ?
C19 C20 1.482(3) . ?

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
C18 O3 C16 118.89(15) . . ?
C2 O4 C1 117.72(18) . . ?
C4 N2 H2 124.2 . . ?
C8 N2 H2 124.2 . . ?
C8 N2 C4 111.60(15) . . ?
C12 N3 C11 110.63(15) . . ?
C20 N3 C11 121.83(16) . . ?
C20 N3 C12 126.41(15) . . ?
O4 C1 H1A 109.5 . . ?
O4 C1 H1B 109.5 . . ?
O4 C1 H1C 109.5 . . ?
H1A C1 H1B 109.5 . . ?
H1A C1 H1C 109.5 . . ?
H1B C1 H1C 109.5 . . ?
O4 C2 C3 123.72(19) . . ?
O4 C2 C7 114.86(18) . . ?
C7 C2 C3 121.42(18) . . ?
C2 C3 H3 121.8 . . ?
C4 C3 C2 116.42(18) . . ?
C4 C3 H3 121.8 . . ?
C3 C4 N2 127.61(18) . . ?
C3 C4 C5 123.08(18) . . ?
C5 C4 N2 109.30(16) . . ?
C4 C5 C9 108.64(16) . . ?
C6 C5 C4 118.91(17) . . ?
C6 C5 C9 132.44(16) . . ?
C5 C6 H6 120.2 . . ?
C5 C6 C7 119.55(17) . . ?
C7 C6 H6 120.2 . . ?
C2 C7 C6 120.58(18) . . ?
C2 C7 H7 119.7 . . ?
C6 C7 H7 119.7 . . ?
O1 C8 N2 125.77(19) . . ?
O1 C8 C9 126.22(18) . . ?
N2 C8 C9 107.94(15) . . ?
C5 C9 C8 102.48(15) . . ?
C5 C9 C10 115.54(16) . . ?
C5 C9 C12 113.79(15) . . ?
C8 C9 C10 116.28(16) . . ?
C8 C9 C12 109.15(14) . . ?
C10 C9 C12 99.94(15) . . ?
C9 C10 H10A 111.0 . . ?
C9 C10 H10B 111.0 . . ?
H10A C10 H10B 109.0 . . ?
C11 C10 C9 103.85(15) . . ?
C11 C10 H10A 111.0 . . ?
C11 C10 H10B 111.0 . . ?
N3 C11 C10 104.22(15) . . ?
N3 C11 H11A 110.9 . . ?
N3 C11 H11B 110.9 . . ?
C10 C11 H11A 110.9 . . ?
C10 C11 H11B 110.9 . . ?
H11A C11 H11B 108.9 . . ?
N3 C12 C9 101.80(14) . . ?
N3 C12 H12 108.5 . . ?
N3 C12 C13 111.28(15) . . ?
C9 C12 H12 108.5 . . ?
C13 C12 C9 117.89(15) . . ?
C13 C12 H12 108.5 . . ?
C12 C13 H13A 109.8 . . ?
C12 C13 H13B 109.8 . . ?
C12 C13 C14 109.17(14) . . ?
H13A C13 H13B 108.3 . . ?
C14 C13 H13A 109.8 . . ?
C14 C13 H13B 109.8 . . ?
C13 C14 H14 108.9 . . ?
C13 C14 C19 109.33(14) . . ?
C15 C14 C13 110.57(15) . . ?
C15 C14 H14 108.9 . . ?
C15 C14 C19 110.32(15) . . ?
C19 C14 H14 108.9 . . ?
C14 C15 H15A 109.6 . . ?
C14 C15 H15B 109.6 . . ?
H15A C15 H15B 108.1 . . ?
C16 C15 C14 110.38(16) . . ?
C16 C15 H15A 109.6 . . ?
C16 C15 H15B 109.6 . . ?
O3 C16 C15 110.90(15) . . ?
O3 C16 H16A 109.5 . . ?
O3 C16 H16B 109.5 . . ?
C15 C16 H16A 109.5 . . ?
C15 C16 H16B 109.5 . . ?
H16A C16 H16B 108.0 . . ?
H17A C17 H17B 109.5 . . ?
H17A C17 H17C 109.5 . . ?
H17B C17 H17C 109.5 . . ?
C18 C17 H17A 109.5 . . ?
C18 C17 H17B 109.5 . . ?
C18 C17 H17C 109.5 . . ?
O3 C18 C17 107.43(17) . . ?
C19 C18 O3 123.43(18) . . ?
C19 C18 C17 129.13(19) . . ?
C18 C19 C14 120.57(17) . . ?
C18 C19 C20 121.95(17) . . ?
C20 C19 C14 117.48(16) . . ?
O2 C20 N3 118.65(17) . . ?
O2 C20 C19 124.46(18) . . ?
N3 C20 C19 116.88(16) . . ?

_olex2_submission_special_instructions 'No special instructions were received'
_exptl_crystal_recrystallization_method 
'Re-crystallisation from solvent: Ethyl acetate'
_chemical_compound_source        N/A
