Process for (<i>S</i>)-Ketamine and (<i>S</i>)-Norketamine via Resolution Combined with Racemization.
Gao, Shenghua; Gao, Xuezhi; Wu, Zenong; Li, Houyong; Yang, Zhezhou; Zhang, Fuli; The Journal of organic chemistry 85 (2020) 8656–8664; doi:10.1021/acs.joc.0c01090

data_4038509
_publ_section_title
;
 Process for (<i>S</i>)-Ketamine and (<i>S</i>)-Norketamine via Resolution
 Combined with Racemization.
;
_journal_issue                   13
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              8656
_journal_page_last               8664
_journal_paper_doi               10.1021/acs.joc.0c01090
_journal_volume                  85
_journal_year                    2020
_chemical_absolute_configuration ad
_chemical_formula_sum            'C13 H17 Cl2 N O'
_chemical_formula_weight         274.17
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 101.2450(10)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   8.5612(3)
_cell_length_b                   7.1443(2)
_cell_length_c                   11.3370(3)
_cell_measurement_reflns_used    9894
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      54.993
_cell_measurement_theta_min      4.851
_cell_volume                     680.10(4)
_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-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.979
_diffrn_measured_fraction_theta_max 0.981
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0411
_diffrn_reflns_av_unetI/netI     0.0303
_diffrn_reflns_Laue_measured_fraction_full 0.979
_diffrn_reflns_Laue_measured_fraction_max 0.981
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            12148
_diffrn_reflns_point_group_measured_fraction_full 0.982
_diffrn_reflns_point_group_measured_fraction_max 0.983
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.994
_diffrn_reflns_theta_min         2.426
_exptl_absorpt_coefficient_mu    0.461
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6127
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.339
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             288
_exptl_crystal_size_max          0.180
_exptl_crystal_size_mid          0.150
_exptl_crystal_size_min          0.120
_refine_diff_density_max         0.185
_refine_diff_density_min         -0.253
_refine_diff_density_rms         0.028
_refine_ls_abs_structure_details
; 
 Flack x determined using 1159 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons and Flack (2004), Acta Cryst. A60, s61). 
;
_refine_ls_abs_structure_Flack   -0.01(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     155
_refine_ls_number_reflns         2620
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.049
_refine_ls_R_factor_all          0.0285
_refine_ls_R_factor_gt           0.0279
_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^)+(0.0308P)^2^+0.1337P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0709
_refine_ls_wR_factor_ref         0.0714
_reflns_Friedel_coverage         0.850
_reflns_Friedel_fraction_full    0.986
_reflns_Friedel_fraction_max     0.987
_reflns_number_gt                2569
_reflns_number_total             2620
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo0c01090_si_003.cif
_cod_data_source_block           mo_d8v19704_0m
_cod_depositor_comments
'Adding full bibliography for 4038508--4038509.cif.'
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4038509
_shelx_estimated_absorpt_t_min   0.922
_shelx_estimated_absorpt_t_max   0.947
_shelxl_version_number           2013-4
_shelx_res_checksum              31403
_shelx_hkl_checksum              52117