A concise asymmetric synthesis of 5,8-di
โ
Yongcheng Song; Sentaro Okamoto; Fumie Sato
๐
Article
๐
2002
๐
Elsevier Science
๐
French
โ 112 KB
A general access to 5,8-disubstituted indolizidine alkaloids has been developed, where the asymmetric addition of an optically active allenyltitanium to benzyl[4-(tert-butyldimethylsilyloxy)butylidene]amine (2) is the key reaction. As a typical example, (-)-indolizidine 209B was efficiently synthesi