[3 + 4] Annulation of Bromoenals and 1,2-Benzenedithiol: Base-Promoted [2 + 4] Reaction and N-Heterocyclic Carbene-Catalyzed Ring-Expansion.
Xia, Fei; Chen, Xiang-Yu; Ye, Song; The Journal of organic chemistry 83 (2018) 15178–15185; doi:10.1021/acs.joc.8b02460

data_4034767
_publ_section_title
;
 [3 + 4] Annulation of Bromoenals and 1,2-Benzenedithiol: Base-Promoted [2
 + 4] Reaction and N-Heterocyclic Carbene-Catalyzed Ring-Expansion.
;
_journal_issue                   24
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              15178
_journal_page_last               15185
_journal_paper_doi               10.1021/acs.joc.8b02460
_journal_volume                  83
_journal_year                    2018
_chemical_formula_moiety         'C15 H12 O S2'
_chemical_formula_sum            'C15 H12 O S2'
_chemical_formula_weight         272.37
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2017-03-30
_audit_creation_method
;
Olex2 1.2
(compiled 2017.03.02 svn.r3394 for OlexSys, GUI svn.r5324)
;
_audit_update_record
;
????
;
_cell_angle_alpha                90
_cell_angle_beta                 101.75(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   13.762(3)
_cell_length_b                   5.5167(11)
_cell_length_c                   17.167(3)
_cell_measurement_reflns_used    3578
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.4785
_cell_measurement_theta_min      1.2115
_cell_volume                     1276.0(5)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2007)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'CIFTAB (Sheldrick, 2013)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'MM007-HF CCD(Saturn 724+)'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_radiation_monochromator  Confocal
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0440
_diffrn_reflns_av_unetI/netI     0.0348
_diffrn_reflns_Laue_measured_fraction_full 0.992
_diffrn_reflns_Laue_measured_fraction_max 0.991
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            10676
_diffrn_reflns_point_group_measured_fraction_full 0.992
_diffrn_reflns_point_group_measured_fraction_max 0.991
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.461
_diffrn_reflns_theta_min         1.734
_diffrn_source                   Confocal
_exptl_absorpt_coefficient_mu    0.400
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.8663
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2007)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.418
_exptl_crystal_description       Block
_exptl_crystal_F_000             568
_exptl_crystal_size_max          0.239
_exptl_crystal_size_mid          0.160
_exptl_crystal_size_min          0.117
_refine_diff_density_max         0.264
_refine_diff_density_min         -0.230
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.118
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     163
_refine_ls_number_reflns         2893
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.118
_refine_ls_R_factor_all          0.0514
_refine_ls_R_factor_gt           0.0471
_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/[\s^2^(Fo^2^)+(0.0240P)^2^+1.2710P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0934
_refine_ls_wR_factor_ref         0.0959
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2716
_reflns_number_total             2893
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo8b02460_si_002.cif
_cod_data_source_block           mx5756
_cod_database_code               4034767
_shelx_shelxl_version_number     2016/6
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
2.a Ternary CH refined with riding coordinates:
 C7(H7)
2.b Secondary CH2 refined with riding coordinates:
 C8(H8A,H8B)
2.c Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C4(H4), C5(H5), C11(H11), C12(H12), C13(H13), C14(H14),
 C15(H15)
;
_olex2_submission_special_instructions 'No special instructions were received'