method has been developed for the preparation of new Tröger base derivatives by an exchange reaction with the methano bridge of rac-Tröger base derivatives with carbonyl compounds in the presence of TiCl4 or POCl3. The use of chiral (S,S)-N,N-bis(α-methylbenzyl)formamide as a carbonyl compound gave the corresponding methano Tröger base derivatives with the diastereomeric ratios of up to 77:23.
已经开发了一种简单的一锅法,用于通过在TiCl 4或POCl 3的存在下与rac- Tröger碱衍
生物的
甲醇桥与羰基化合物进行交换反应来制备新的Tröger碱衍
生物。使用手性(S,S)-N,N-双(α-甲基苄基)甲酰胺作为羰基化合物可得到相应的亚甲基Tröger碱衍
生物,其非对映体比例高达77:23。