Tandem four-component reaction for efficient synthesis of dihydrothiophene with substituted amino acid ethyl esters
Sun, Jing; Zhang, Yu; Yan, Chao-Guo; RSC Advances 8 (2018) 22498–; doi:10.1039/C8RA03605E

data_7230970
_publ_section_title
;
 Tandem four-component reaction for efficient synthesis of
 dihydrothiophene with substituted amino acid ethyl esters
;
_journal_issue                   40
_journal_name_full               'RSC Advances'
_journal_page_first              22498
_journal_paper_doi               10.1039/C8RA03605E
_journal_volume                  8
_journal_year                    2018
_chemical_formula_moiety         'C18 H18 N4 O4 S'
_chemical_formula_sum            'C18 H18 N4 O4 S'
_chemical_formula_weight         386.42
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2018-02-14 deposited with the CCDC.
2018-06-13 downloaded from the CCDC.
;
_cell_angle_alpha                69.1600(15)
_cell_angle_beta                 76.3073(18)
_cell_angle_gamma                84.3478(17)
_cell_formula_units_Z            2
_cell_length_a                   6.3930(4)
_cell_length_b                   12.5630(6)
_cell_length_c                   13.1829(7)
_cell_measurement_reflns_used    4656
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      23.96
_cell_measurement_theta_min      2.81
_cell_volume                     961.28(9)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0404
_diffrn_reflns_av_unetI/netI     0.0551
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            15143
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.499
_diffrn_reflns_theta_min         2.811
_exptl_absorpt_coefficient_mu    0.199
_exptl_absorpt_correction_T_max  0.961
_exptl_absorpt_correction_T_min  0.950
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.335
_exptl_crystal_description       block
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_exptl_crystal_size_min          0.200
_refine_diff_density_max         0.657
_refine_diff_density_min         -0.443
_refine_diff_density_rms         0.055
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.021
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     245
_refine_ls_number_reflns         4392
_refine_ls_number_restraints     343
_refine_ls_restrained_S_all      1.103
_refine_ls_R_factor_all          0.1187
_refine_ls_R_factor_gt           0.0663
_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^)+(0.0960P)^2^+0.5324P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1723
_refine_ls_wR_factor_ref         0.1996
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2655
_reflns_number_total             4392
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8ra03605e2.cif
_cod_data_source_block           3g
_cod_database_code               7230970
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.950
_shelx_estimated_absorpt_t_max   0.961
_shelx_res_checksum              54644