Removal of the Pyrrolidine Substituent by Dehydrogenation of 4-Pyrrolidin-2-yl-3,4-dihydro-and 1,2,3,4-tetrahydroisoquinolines
作者:Siavosh Mahboobi、Annette Karcher、Götz Grothus、Wolfgang Wagner、Wolfgang Wiegrebe
DOI:10.1002/ardp.19943270704
日期:——
Pyrrolidin‐2‐yl‐groups located at C‐4 of 3,4‐dihydro‐ or 1,2,3,4‐tetrahydroisoquinolines, respectively, are lost in the course of dehydrogenation of these isoquinoline derivatives. However, acyclically substituted isoquinolines, hydrogenated in ring B, 2‐benzyl‐4‐(l‐dimethylaminoethyl)‐1,2,3,4‐tetrahydroisoquinoline, e.g., show loss of the amine group only by benzylic cleavage, affording 4‐ethylisoquinoline
在这些异喹啉衍生物的脱氢过程中,分别位于 3,4-二氢-或 1,2,3,4-四氢异喹啉的 C-4 位的吡咯烷 - 2-基-基团丢失。然而,无环取代的异喹啉,在 B 环中氢化,2-苄基-4-(l-二甲氨基乙基)-1,2,3,4-四氢异喹啉,例如,显示仅通过苄基裂解失去胺基,得到 4-乙基异喹啉. 该反应的范围和限制使用特定取代的异喹啉确定。