[4+1] cyclization of α-diazo esters and mesoionic N-heterocyclic olefins.
Liang, Qiuming; Zeng, Yimin; Mendez Ocampo, Pedro A.; Zhu, Hui; Qu, Zheng-Wang; Grimme, Stefan; Song, Datong; Chemical communications (Cambridge, England) 59 (2023) 4770–4773; doi:10.1039/d3cc01139a

data_7131485
_publ_section_title
;
 [4+1] cyclization of &#x3b1;-diazo esters and mesoionic N-heterocyclic
 olefins.
;
_journal_issue                   32
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              4770
_journal_page_last               4773
_journal_paper_doi               10.1039/d3cc01139a
_journal_volume                  59
_journal_year                    2023
_chemical_formula_sum            'C49 H54 N4 O2'
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_audit_update_record
;
2023-02-19 deposited with the CCDC.	2023-03-24 downloaded from the CCDC.
;
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_exptl_absorpt_process_details
;
 SADABS 2016/2: Krause, L., Herbst-Irmer, R., Sheldrick G.M. & Stalke D.,
 J. Appl. Cryst. 48 (2015) 3-10
;
_exptl_crystal_colour            'light yellow'
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_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2016/6 (Sheldrick 2016)'
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_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.1419
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_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^)+(0.0802P)^2^+0.3351P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1733
_refine_ls_wR_factor_ref         0.1967
_reflns_Friedel_coverage         0.000
_reflns_number_gt                6773
_reflns_number_total             12762
_reflns_threshold_expression     'I > 2\s(I)'
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_cod_data_source_block           wl601_sq
_cod_depositor_comments
'Adding full bibliography for 7131480--7131487.cif.'
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7131485
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