作者:Parviz Gharagozloo、Masao Miyauchi、Nigel J.M. Birdsall
DOI:10.1016/0040-4020(96)00553-4
日期:1996.7
Substituted indoles have been condensed with N-benzyl-4-piperidone to give 3-(1-benzyl-1,2,3,6-tetrahydropyridin-4-yl)-1H-indoles. Under basic conditions, 5-, 6-, and 7- (but not 4-) substituted indoles give reasonable yields of the product. For condensation with 4-substituted indoles, acidic conditions and the presence of at least a 3-fold excess of N-benzyl-4-piperidone are beneficial. Under basic
取代的吲哚已经与N-苄基-4-哌啶酮缩合,得到3-(1-苄基-1,2,3,6-四氢吡啶-4-基)-1 H-吲哚。在碱性条件下,用5-,6-和7-(但不是4-)取代的吲哚可得到合理的产物收率。为了与4-取代的吲哚缩合,酸性条件和至少3-倍过量的N-苄基-4-哌啶酮的存在是有利的。在碱性条件下,取决于N-取代基的性质,吲哚与N-取代-3-哌啶酮的缩合是高度区域选择性的,具有区域选择性。4-取代的吲哚不与N反应在碱性条件下被取代的-3-哌啶酮,但在酸性条件下得到单一产物。