Stereoselective photoinduced electrocyclic ring closure of aromatic enehydrazides. Asymmetric synthesis of 3-aryl dihydroisoquinolones and tetrahydroisoquinolines
作者:Mélanie Dubois、Eric Deniau、Axel Couture、Pierre Grandclaudon
DOI:10.1016/j.tet.2012.06.037
日期:2012.9
route for the stereoselective synthesis of a variety of 3-aryl dihydroisoquinolones and tetrahydroisoquinolines has been developed. The key step is a diastereoselective photoinduced 6π-electrocyclic ring closure of enantiopure aromatic enehydrazides via a 1,4-remote asymmetric induction. N–N bond cleavage to release the chiral appendage from the preliminary annulated compounds and/or concomitant reduction
已经开发出灵活的路线,用于立体选择性地合成各种3-芳基二氢异喹啉酮和四氢异喹啉。关键步骤是通过1,4-远程不对称诱导,对映体选择性光诱导对映体纯芳族乙酰肼的6π-电子环闭环。N-N键裂解从初步的环状化合物中释放出手性附属物,和/或随之而来的内酰胺羰基还原,完成了标题化合物的合成。