Directed Lithiation of 1-(tert-Butoxycarbonyl)indolines. A Convenient Route to 7-Substituted Indolines
摘要:
1-(tert-Butoxycarbonyl)indolines were regioselectively lithiated at 7-position with s-BuLi-TMEDA in ether or TBF at -78-degrees-C. The lithiated species were reacted with a range of electrophiles to give 7-substituted indoline derivatives.