作者:Toshikazu Hakogi、Yoshiko Monden、Misako Taichi、Seiji Iwama、Shinobu Fujii、Kiyoshi Ikeda、Shigeo Katsumura
DOI:10.1021/jo025529o
日期:2002.7.1
The highly efficient and stereocontrolled syntheses of sphingomyelin carbon analogues 1 and 2 were achieved by effectively utilizing Hofmann rearrangement of enantiomerically pure beta-hydroxyamide 7, which was prepared by an asymmetric hydrogenation of alpha-acyl-gamma-butyrolactone 9 and ring opening with NH(3). Intermediary isocyanate 6 was selectively trapped with the vicinal hydroxy group in an
鞘磷脂碳类似物1和2的高效和立体控制的合成是通过有效利用对映体纯的β-羟酰胺7的霍夫曼重排实现的,该对映体是通过α-酰基-γ-丁内酯9的不对称加氢和NH( 3)。中间异氰酸酯6以分子内方式选择性地被邻位羟基捕获,生成恶唑烷酮衍生物5。在合成极性极强的化合物(例如1)时,一种方便的一锅法是将苄氧羰基引入到恶唑烷酮开环产生的羟基是另一个关键点,因为除了效率外,该保护基还可以通过简单的步骤和最后一步的后处理容易地除去。