Studies on quinazolines IX:1 Fluorination versus 1,2-migration in the reaction of 1,3-bifunctionalized amino-2-propanol with DAST
作者:Ji-Wang Chern、Jun-Yi Chang、Cyril O. Usifoh、Alexander Gutsait
DOI:10.1016/s0040-4039(98)01905-4
日期:1998.11
Treatment of 1-phthaloylamino-3-[4-(2-methoxyphenyl)piperazin-1-yl]-propanol (7) with DAST induced 1,2-migration via a proposed spiro-aziridinium intermediate to give N-[2-fluoro-3-[4-(2-methoxyphenyl)piperazin-1-yl]propyl]-phthalimide (11a) in 13 % yield and N-[2-fluoromethyl-2-[4-(2-methoxyphenyl)-piperazin-1-yl]ethyl]phthalimide (11b) in 73% yield.
通过拟议的螺-叠氮鎓中间体,用DAST诱导的1,2-迁移,处理1-邻苯二甲酰基氨基-3- [4-(2-甲氧基苯基)哌嗪-1-基]-丙醇(7),得到N- [2-氟-3- [4-(2-甲氧基苯基)哌嗪-1-基]丙基]-邻苯二甲酰亚胺(11a),产率为13%,N- [2-氟甲基-2- [4-(2-甲氧基苯基)-哌嗪-1] -基]乙基]邻苯二甲酰亚胺(11b),产率为73%。