Donor-acceptor cyclopropanes as ortho-quinone methide equivalents in formal (4 + 2)-cycloaddition to alkenes.
Ivanov, Konstantin L.; Bezzubov, Stanislav I.; Melnikov, Mikhail Ya; Budynina, Ekaterina M.; Organic & biomolecular chemistry 16 (2018) 3897–3909; doi:10.1039/c8ob00377g

data_7156149
_publ_section_title
;
 Donor-acceptor cyclopropanes as ortho-quinone methide equivalents in
 formal (4 + 2)-cycloaddition to alkenes.
;
_journal_issue                   21
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              3897
_journal_page_last               3909
_journal_paper_doi               10.1039/c8ob00377g
_journal_volume                  16
_journal_year                    2018
_chemical_formula_moiety         'C27 H26 O5'
_chemical_formula_sum            'C27 H26 O5'
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_chemical_name_systematic
;
Dimethyl [(2,2-diphenyl-3,4-dihydro-2H-chromen-4-yl)methyl]malonate
;
_space_group_crystal_system      monoclinic
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_space_group_name_Hall           '-P 2ybc'
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_symmetry_space_group_name_Hall  '-P 2ybc'
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_atom_sites_solution_hydrogens   geom
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_audit_update_record
;
2018-01-20 deposited with the CCDC.
2018-03-13 downloaded from the CCDC.
;
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_diffrn_ambient_temperature      150(2)
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_diffrn_measurement_device_type  'Bruker SMART APEX II'
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_diffrn_reflns_point_group_measured_fraction_full 1.000
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_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.091
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_exptl_absorpt_process_details   'SADABS (Bruker, 2008)'
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_exptl_crystal_description       BLOCK
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_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: dichloromethane'
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_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0518P)^2^+0.7973P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1026
_refine_ls_wR_factor_ref         0.1065
_reflns_Friedel_coverage         0.000
_reflns_number_gt                5080
_reflns_number_total             5745
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_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'MULTI-SCAN' changed to
'multi-scan' according to
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 

 Adding full bibliography for 7156149--7156154.cif.
;
_cod_database_code               7156149
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.952
_shelx_estimated_absorpt_t_max   0.969
_shelx_res_checksum              10973