Synthesis of Spirolactones and Functionalized Benzofurans via Addition of 3-Sulfonylphthalides to 2-Formylaryl Triflates and Conversion to Benzofuroisocoumarins
作者:Deepa Nair、Pallabita Basu、Soumyaranjan Pati、Kajal Baseshankar、Chenikkayala Siva Sankara、Irishi N. N. Namboothiri
DOI:10.1021/acs.joc.2c03097
日期:——
modified Hauser–Kraus reaction of 3-sulfonylphthalide with 2-formylaryl triflates is reported here. The initial reaction involved 1,2-addition of phthalide to the formyl group and intramolecular cyclization via substitution of triflate followed by a cascade of rearrangements leading to spirolactone or benzofuran derivatives. The electronic nature of substituents on aryl triflates affected the course