Activator free diastereoselective 1,3-dipolar cycloaddition: a quick access to coumarin based spiro multi heterocyclic adducts
Thadem, Nagender; Rajesh, Manda; Das, Saibal; RSC Advances 11 (2021) 29934–29938; doi:10.1039/D1RA05070B

data_7243503
_publ_section_title
;
 Activator free diastereoselective 1,3-dipolar cycloaddition: a quick
 access to coumarin based spiro multi heterocyclic adducts
;
_journal_issue                   48
_journal_name_full               'RSC Advances'
_journal_page_first              29934
_journal_page_last               29938
_journal_paper_doi               10.1039/D1RA05070B
_journal_volume                  11
_journal_year                    2021
_chemical_formula_moiety         'C28 H21 N3 O2'
_chemical_formula_sum            'C28 H21 N3 O2'
_chemical_formula_weight         431.48
_space_group_crystal_system      monoclinic
_space_group_IT_number           9
_space_group_name_Hall           'C -2yc'
_space_group_name_H-M_alt        'C 1 c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2021-02-26 deposited with the CCDC.	2021-09-02 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 116.366(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.5012(10)
_cell_length_b                   21.4163(19)
_cell_length_c                   10.7561(9)
_cell_measurement_reflns_used    9865
_cell_measurement_temperature    294(2)
_cell_measurement_theta_max      30.47
_cell_measurement_theta_min      2.36
_cell_volume                     2167.4(3)
_computing_cell_refinement       '<i>SAINT</i> (Bruker, 2016)'
_computing_data_collection       '<i>APEX3</i> (Bruker, 2016)'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  '<i>SHELXL2014</i> (Sheldrick, 2015b)'
_computing_structure_solution    '<i>SHELXT</i> (Sheldrick, 2015a)'
_diffrn_ambient_temperature      294(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker D8 QUEST PHOTON-100'
_diffrn_measurement_method       '\w and \f'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0252
_diffrn_reflns_av_unetI/netI     0.0227
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       30
_diffrn_reflns_limit_k_min       -30
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            31296
_diffrn_reflns_point_group_measured_fraction_full 0.984
_diffrn_reflns_point_group_measured_fraction_max 0.949
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.565
_diffrn_reflns_theta_min         2.448
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.7153
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Bruker, 2016'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.322
_exptl_crystal_description       block
_exptl_crystal_F_000             904
_exptl_crystal_size_max          0.260
_exptl_crystal_size_mid          0.240
_exptl_crystal_size_min          0.170
_refine_diff_density_max         0.164
_refine_diff_density_min         -0.212
_refine_diff_density_rms         0.035
_refine_ls_abs_structure_details
;
 Flack x determined using 2368 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.2(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.017
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     298
_refine_ls_number_reflns         6275
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.016
_refine_ls_R_factor_all          0.0473
_refine_ls_R_factor_gt           0.0411
_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^)+(0.0703P)^2^+0.3115P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1055
_refine_ls_wR_factor_ref         0.1105
_reflns_Friedel_coverage         0.897
_reflns_Friedel_fraction_full    0.972
_reflns_Friedel_fraction_max     0.899
_reflns_number_gt                5689
_reflns_number_total             6275
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1ra05070b2.cif
_cod_data_source_block           KA781_0m
_cod_original_sg_symbol_H-M      'C c'
_cod_database_code               7243503
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.978
_shelx_estimated_absorpt_t_max   0.986
_shelx_res_checksum              36328