One-pot, multicomponent, diastereoselective, green synthesis of 3,4-dihydro-2H-benzo[b][1,4]oxazine analogues.
Kushwaha, Narva Deshwar; Kushwaha, Babita; Karpoormath, Rajshekhar V.; Mahlalela, Mavela Cleopus; Shinde, Suraj Raosaheb; The Journal of organic chemistry  (2020) –; doi:10.1021/acs.joc.0c00463

data_4038445
_publ_section_title
;
 One-pot, multicomponent, diastereoselective, green synthesis of
 3,4-dihydro-2H-benzo[b][1,4]oxazine analogues.
;
_journal_name_full               'The Journal of organic chemistry'
_journal_paper_doi               10.1021/acs.joc.0c00463
_journal_year                    2020
_chemical_formula_moiety         'C21 H15 Cl2 N O2'
_chemical_formula_sum            'C21 H15 Cl2 N O2'
_chemical_formula_weight         384.24
_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   mixed
_atom_sites_solution_primary     direct
_audit_creation_date             2019-10-30
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                90
_cell_angle_beta                 111.5660(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.4411(2)
_cell_length_b                   15.0003(3)
_cell_length_c                   11.6037(2)
_cell_measurement_reflns_used    9888
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.47
_cell_measurement_theta_min      2.25
_cell_volume                     1690.14(6)
_computing_cell_refinement       'COSMO (Bruker, V1.61, 2009)'
_computing_data_collection       'COSMO (Bruker, V1.61, 2009)'
_computing_data_reduction        'SAINT (Bruker)'
_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    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      100.15
_diffrn_detector                 'Bruker APEX2 area detector'
_diffrn_detector_area_resol_mean 7.9
_diffrn_detector_type            'CCD area detector'
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.973
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker SMART APEX2 area detector'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0359
_diffrn_reflns_av_unetI/netI     0.0359
_diffrn_reflns_Laue_measured_fraction_full 0.987
_diffrn_reflns_Laue_measured_fraction_max 0.973
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            12982
_diffrn_reflns_point_group_measured_fraction_full 0.987
_diffrn_reflns_point_group_measured_fraction_max 0.973
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.666
_diffrn_reflns_theta_min         2.325
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_type              'sealed X-ray tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.400
_exptl_absorpt_correction_T_max  0.949
_exptl_absorpt_correction_T_min  0.883
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker)'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.510
_exptl_crystal_description       block
_exptl_crystal_F_000             792
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.341
_refine_diff_density_min         -0.259
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     239
_refine_ls_number_reflns         3846
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0424
_refine_ls_R_factor_gt           0.0308
_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^)+(0.0408P)^2^+0.1100P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0753
_refine_ls_wR_factor_ref         0.0799
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3062
_reflns_number_total             3846
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo0c00463_si_002.cif
_cod_data_source_block           9b
_cod_database_code               4038445
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.939
_shelx_estimated_absorpt_t_min   0.893
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
2.a Ternary CH refined with riding coordinates:
 C8(H8), C7(H7)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C11(H11), C21(H21), C5(H5), C17(H17), C4(H4), C14(H14), C13(H13),
 C1(H1A), C18(H18), C20(H20), C19(H19)
;
_shelx_res_checksum              71546
_shelx_hkl_checksum              89074
_olex2_submission_special_instructions 'No special instructions were received'