带有N-苯基马来酰亚胺的2-(1'-环烯基)噻吩和2-(1'-环烯基)苯并[ b ]噻吩的Diels-Alder / Ene反应性:环烯环大小对苯并噻吩和二苯并噻吩产物分布的作用
摘要:
噻吩和苯并噻吩的支架是自然界中发现的丰富的生物活性化合物的重要类别。2-(1'-环烯基)噻吩和2-(1'-环烯基)苯并[ b ]噻吩的Diels-Alder反应具有在五个,六个,七个,八个和十二个烷基中存在的烯基N取代的成员环-苯基马来酰亚胺被表征。环烯环的大小在决定预期的和异构化的Diels-Alder加合物的产物分布中起着至关重要的作用。2D NMR研究表明,具有五,六和七元环的2-(1'-环烯基)噻吩的分离的异构体是芳构化的苯并噻吩产物,而八和十二元环是未重排的加合物。另外,对于五元和六元环的情况,分离出随后的与N-苯基马来酰亚胺的烯反应的产物。有趣的是,在2-(1'-环烯基)苯并[ b具有五元,六元,七元,八元和十二元环的]噻吩,在任何情况下均未分离未重排的二苯并噻吩Diels-Alder加合物。进行分子力学和密度泛函理论(M06-2X和PBE0-D3)的计算是为了了解各种二烯对于
Synthesis and biological evaluation of 1-[1-(2-benzo[b]thienyl)cyclohexyl]piperidine homologs at dopamine-uptake and phencyclidine-, and .sigma.-binding sites
作者:Xiao Shu He、Lionel P. Raymon、Mariena V. Mattson、Mohyee E. Eldefrawi、Brian R. de Costa
DOI:10.1021/jm00061a009
日期:1993.4
related to BTCP exhibited greater selectivity for sites labeled by [3H]BTCP. However, several of the BTCP-related derivatives showed greater (compared with BTCP and cocaine) ability to displace [3H]cocaine. Most notably, 1-[1-(2-benzo[b]thienyl)cyclohexyl]pyrrolidine (7) exhibited a 3.4-fold greater affinity for these sites compared with BTCP and a 9-fold greater affinity at these sites than cocaine