Base-promoted [4 + 2] cycloaddition of alkynyl 1,3-dithianes and chalcones to access highly substituted pyran derivatives.
Zheng, Yi; Li, Rui-Peng; Gong, Xiaomeng; Xu, Xiangrong; Tang, Shouchu; Organic & biomolecular chemistry 23 (2025) 6209–6213; doi:10.1039/d5ob00650c

data_7160568
_publ_section_title
;
 Base-promoted [4 + 2] cycloaddition of alkynyl 1,3-dithianes and
 chalcones to access highly substituted pyran derivatives.
;
_journal_issue                   25
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              6209
_journal_page_last               6213
_journal_paper_doi               10.1039/d5ob00650c
_journal_volume                  23
_journal_year                    2025
_chemical_formula_sum            'C27 H22 Cl2 O S2'
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_atom_sites_solution_hydrogens   geom
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_audit_update_record
;
2025-01-15 deposited with the CCDC.	2025-05-30 downloaded from the CCDC.
;
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_diffrn_ambient_temperature      304(2)
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_diffrn_radiation_type           CuK\a
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_refine_ls_extinction_method     none
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_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0807P)^2^+2.0735P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1548
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_reflns_number_total             4950
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5ob00650c2.cif
_cod_data_source_block           liruip_1007-3_auto
_cod_depositor_comments          'Adding full bibliography for 7160568.cif.'
_cod_original_cell_volume        4951.19(14)
_cod_database_code               7160568
_shelx_shelxl_version_number     2018/1
_shelx_res_checksum              35976