期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 83, 期 7, 页码 3688-3701出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.8b00047
关键词
-
资金
- Ministry of Science and Technology of Taiwan [MOST 104-2320-B-002-008-MY3, 105-0210-01-13-01, 106-0210-01-15-02, 106-2627-M-002-001]
This study examines the utility of the N-benzylcarbamoyl (BnCar) protecting group in glycosylation reactions of the parent O-2 protected carbohydrate donor. It was found that the BnCar group imparted exclusively beta-selectivity with primary and secondary alcohols. A mechanistic study revealed the activated intermediate to be the glycosyl triflate in a skew conformation, which results in beta-selective glycosylation via an S(N)2-like pathway. The BnCar group can be readily cleaved using tetrabutylammonium nitrite, without affecting ester and ether protecting groups. Taken together, these results show BnCar to be useful for the synthesis of complex oligosaccharides, an undertaking that requires delicate chemical differentiation of various protecting groups.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据