Synthesis of indenofurans, benzofurans and spiro-lactones via Hauser-Kraus annulation involving 1,6-addition of phthalide to quinone methides.
Basu, Pallabita; Satam, Nishikant; Namboothiri, Irishi N. N.; Organic & biomolecular chemistry 18 (2020) 5677–5687; doi:10.1039/d0ob01115k

data_7157577
_publ_section_title
;
 Synthesis of indenofurans, benzofurans and spiro-lactones via
 Hauser-Kraus annulation involving 1,6-addition of phthalide to quinone
 methides.
;
_journal_issue                   29
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              5677
_journal_page_last               5687
_journal_paper_doi               10.1039/d0ob01115k
_journal_volume                  18
_journal_year                    2020
_chemical_formula_sum            'C29 H30 O4'
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_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2020-04-04 deposited with the CCDC.	2020-07-07 downloaded from the CCDC.
;
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'dtrek-CrysAlisPro-abstract goniometer imported rigaku-d*trek images'
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'CrysAlisPro 1.171.38.43 (Rigaku Oxford Diffraction, 2015)'
_exptl_crystal_colour            colourless
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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^)+(0.0586P)^2^+1.4213P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
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_reflns_number_gt                3675
_reflns_number_total             4323
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0ob01115k2.cif
_cod_data_source_block           inn-2nss-186-b_mo
_cod_depositor_comments
'Adding full bibliography for 7157576--7157578.cif.'
_cod_database_code               7157577
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.984
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_shelx_res_checksum              25761