Novel synthesis of 2,3-dihydrobenzofuran-3-amines from salicylic aldehydes: Trimethylsilyl as traceless activating group
作者:Polina A. Khardina、Evgeny M. Buev、Vladimir S. Moshkin、Vyacheslav Y. Sosnovskikh
DOI:10.1016/j.tetlet.2024.154992
日期:2024.4
Salicylic aldehydes were readily alkylated with (chloromethyl)trimethylsilane to give silylated -methoxy benzaldehydes in 85–96 % yields. These aldehydes were converted into alkyl and aryl imines in excellent yields. -(Trimethylsilyl)methyl moiety was applied as the synthetic equivalent of aryloxymethyl anion in the nucleophilic cyclization at the imine group promoted by CsF in DMF at 140 °C. Using