FeCl3-catalyzed cyclization of α-sulfonamido-allenes with aldehydes—the substituent effect
作者:Jiajia Cheng、Xinjun Tang、Yihua Yu、Shengming Ma
DOI:10.1039/c2cc36941a
日期:——
FeCl3-catalyzed aza-Prins-cyclization reaction of α-sulfonamido-allenes with aldehydes afforded 1,2,3,6-tetrahydropyridine or 2,5-dihydro-1H-pyrrole derivatives efficiently and highly selectively. The different regioselectivity is probably caused by the stabilizing effect of the phenyl group on the positively charged allylic intermediate.
在 FeCl3 催化下,δ-磺酰胺基亚庚烯与醛的氮杂-普林环化反应高效且高选择性地生成了 1,2,3,6- 四氢吡啶或 2,5- 二氢-1H-吡咯衍生物。不同的区域选择性可能是由于苯基对带正电荷的烯丙基中间体的稳定作用造成的。