Disclosed are compounds of formula III and a process to prepare a compound of formula III
wherein R
1
, R
2
, R
3
and R
6
are defined herein, using a zinc chloride/optionally substituted oxazole adduct and an compound of formula I. Further disclosed are methods of using compounds of formula III to prepare compounds useful in the treatment of Alzheimer's disease and related conditions.
本发明涉及III式化合物和制备III式化合物的方法,其中R1、R2、R3和R6在此定义,使用
氯化锌/可选取代
噁唑加合物和I式化合物。此外,本发明还涉及使用III式化合物制备在治疗阿尔茨海默病和相关疾病中有用的化合物的方法。