Total Synthesis of (−)-Belactosin C and Derivatives via Double Diastereoselective Tandem Mukaiyama Aldol Lactonizations
作者:Sung Wook Cho、Daniel Romo
DOI:10.1021/ol070275k
日期:2007.4.1
[reaction: see text] The enantioselective synthesis of (-)-belactosin C and derivatives was accomplished in a concise manner employing the tandem, Mukaiyama aldol-lactonizaton (TMAL) process. One approach involved a distal double diastereoselective TMAL reaction with a dipeptide glyoxamide, whereas a second approach involved amide coupling of a dipeptide with a beta-lactone carboxylic acid, obtained
[反应:见正文]采用串联的Mukaiyama aldol-lactonizaton(TMAL)方法以简明的方式完成了(-)-半乳糖苷酶C及其衍生物的对映选择性合成。一种方法涉及与二肽乙二酰乙酰胺的远端双非对映选择性TMAL反应,而第二种方法涉及二肽与β-内酯羧酸的酰胺偶联,这是通过使用手性甲硅烷基乙烯酮缩醛的TMAL工艺获得的。非对映选择性的显着改善是在近端双非对映选择性TMAL过程中实现的。