Unprecedented One-Pot, Domino Tertiary Alcohol Protection–Michael Type Addition of Halides to Morita–Baylis–Hillman Adduct of Isatin with RCOX/K<sub>2</sub>CO<sub>3</sub>: Diastereoselective Synthesis of Oxindole Appended β-Halo Esters
作者:Rajarethinam Solaiselvi、Ponnusamy Shanmugam、Asit Baran Mandal
DOI:10.1021/ol303554c
日期:2013.3.15
A facile method utilizing RDOX/K2CO3 as a novel reagent for conjugate addition of hydrogen halide, in addition to tertiary (3 degrees)-hydroxyl protection that leads to the synthesis of functionalized beta-halo Morita-Baylis-Hillman ester appended oxindoles, has been developed. The diastereoselective one-pot O-acylation-hydrohalogenation observed cannot otherwise be performed by treatment with hydrohalide. Deprotection of a 3 degrees-hydroxyl protecting group has also been demonstrated by treatment with hydrochloric acid.