Competitive 3+2 and 2+2 cycloadditions of ester stabilized azaallyl anions to benzynes. Ring expansion of initial 3+2 products to isoquinolin-3-ones
作者:Helmi Hussain、Ebrahim Kianmehr、Tony Durst
DOI:10.1016/s0040-4039(01)00130-7
日期:2001.3
Reaction of the azaallyllithiums derived from imines of α-amino esters with benzynes results in the formation of 1,3-dihydroisoindoles and 4-hydroxyisoquinolines via 3+2 and 2+2 cycloadditions, respectively. The initially formed 1-carboethoxy-1,3-dihydroisoindoles rearrange under basic reaction conditions to form 3-(2H)-isoquinolinones.
衍生自α-氨基酯亚胺的氮杂烯丙基锂与苯并炔的反应分别通过3 + 2和2 + 2环加成反应形成1,3-二氢异吲哚和4-羟基异喹啉。最初形成的1-carboethoxy-1,3-dihydroisoindoles在碱性反应条件下重排形成3-(2 H)-异喹啉酮。