Facile access to 2,2-diaryl 2H-chromenes through a palladium-catalyzed cascade reaction of ortho-vinyl bromobenzenes with N-tosylhydrazones.
Zhang, Heng; Yu, Yinghua; Huang, Xueliang; Organic & biomolecular chemistry 18 (2020) 5115–5119; doi:10.1039/d0ob00978d

data_7157557
_publ_section_title
;
 Facile access to 2,2-diaryl 2H-chromenes through a palladium-catalyzed
 cascade reaction of ortho-vinyl bromobenzenes with N-tosylhydrazones.
;
_journal_issue                   27
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              5115
_journal_page_last               5119
_journal_paper_doi               10.1039/d0ob00978d
_journal_volume                  18
_journal_year                    2020
_chemical_formula_sum            'C22 H18 O2'
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_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2020-01-04 deposited with the CCDC.	2020-06-22 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
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_cell_angle_gamma                90.00
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_cell_length_c                   18.320(4)
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_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      27.4700
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_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
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_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker P4'
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_diffrn_radiation_monochromator  graphite
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_diffrn_reflns_theta_min         2.72
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            White
_exptl_crystal_density_diffrn    1.255
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
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_refine_ls_shift/su_mean         0.004
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0736P)^2^+0.0067P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1149
_refine_ls_wR_factor_ref         0.1329
_reflns_number_gt                2214
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_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            d0ob00978d2.cif
_cod_data_source_block           d
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 

 Adding full bibliography for 7157557--7157560.cif.
;
_cod_original_cell_volume        1663.7(6)
_cod_original_sg_symbol_H-M      'P2(1)/n  '
_cod_database_code               7157557