Transition Metal Catalyzed Stereodivergent Synthesis of syn- and anti-δ-Vinyl-Lactams: Formal Total Synthesis of (−)-Cermizine C and (−)-Senepodine G
Breit, Bernhard; Schmidt, Johannes; Chemical Science  (2019) –; doi:10.1039/C8SC05502E

data_1550525
_publ_section_title
;
 Transition Metal Catalyzed Stereodivergent Synthesis of syn- and
 anti-\d-Vinyl-Lactams: Formal Total Synthesis of (&#x2212;)-Cermizine C
 and (&#x2212;)-Senepodine G
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/C8SC05502E
_journal_year                    2019
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C17 H21 N O3 S'
_chemical_formula_sum            'C17 H21 N O3 S'
_chemical_formula_weight         319.41
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2018-04-27
_audit_creation_method
;
Olex2 1.2
(compiled 2018.04.26 svn.r3504 for OlexSys, GUI svn.r5492)
;
_audit_update_record
;
2018-04-27 deposited with the CCDC.
2019-01-24 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.89110(10)
_cell_length_b                   12.2990(3)
_cell_length_c                   22.4992(5)
_cell_measurement_reflns_used    6938
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      30.992
_cell_measurement_theta_min      3.182
_cell_volume                     1630.17(6)
_computing_cell_refinement       'SAINT V8.38A (Madison, 2016)'
_computing_data_collection       'Bruker APEX2 software'
_computing_data_reduction        'SAINT V8.38A (Madison, 2016)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      100.0
_diffrn_detector                 'Bruker APEX2 area detector'
_diffrn_detector_area_resol_mean 7.9
_diffrn_detector_type            'CCD area detector'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device       'fixed-chi two circle goniometer'
_diffrn_measurement_device_type  'Bruker SMART APEX2 area detector'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  'mirror optics'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0347
_diffrn_reflns_av_unetI/netI     0.0370
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            22098
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.503
_diffrn_reflns_theta_min         1.810
_diffrn_source                   'microfocus sealed X-ray tube'
_diffrn_source_current           50
_diffrn_source_type              'Incoatec Mo I\ms'
_diffrn_source_voltage           0.6
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.210
_exptl_absorpt_correction_T_max  0.7463
_exptl_absorpt_correction_T_min  0.7132
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.0887 before and 0.0413 after correction. The Ratio of minimum to maximum transmission is 0.9556. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.301
_exptl_crystal_description       needle
_exptl_crystal_F_000             680
_exptl_crystal_recrystallization_method
'The material was recrystallised from ethyl acetate by slow evaporation'
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.264
_refine_diff_density_min         -0.327
_refine_diff_density_rms         0.047
_refine_ls_abs_structure_details
;
 Flack x determined using 1717 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.01(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     200
_refine_ls_number_reflns         4988
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0420
_refine_ls_R_factor_gt           0.0359
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0461P)^2^+0.1951P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0856
_refine_ls_wR_factor_ref         0.0890
_reflns_Friedel_coverage         0.738
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.997
_reflns_number_gt                4485
_reflns_number_total             4988
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8sc05502e2.cif
_cod_data_source_block           breitjs_5_74_0m_a
_cod_database_code               1550525
_shelx_shelxl_version_number     2018/3
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C3(H3), C5(H5), C8(H8)
2.b Secondary CH2 refined with riding coordinates:
 C2(H2A,H2B), C4(H4A,H4B), C9(H9A,H9B), C10(H10A,H10B)
2.c Aromatic/amide H refined with riding coordinates:
 C6(H6), C12(H12), C13(H13), C15(H15), C16(H16)
2.d X=CH2 refined with riding coordinates:
 C7(H7A,H7B)
2.e Idealised Me refined as rotating group:
 C17(H17A,H17B,H17C)
;
_shelx_res_checksum              3262
_olex2_diffrn_ambient_temperature_device 'Oxford Cryosystems 800'
_olex2_exptl_crystal_mounting_method
'The crystal was mounted on a MITIGEN holder in perfluoroether oil'
_olex2_submission_original_sample_id JS_5_74
_olex2_submission_special_instructions 'No special instructions were received'