Syntheses of the Enantiomers of 1-Deoxynojirimycin and 1-Deoxyaltronojirimycin via Chemo- and Diastereoselective Olefinic Oxidation of Unsaturated Amines
作者:Sharan K. Bagal、Stephen G. Davies、James A. Lee、Paul M. Roberts、Philip M. Scott、James E. Thomson
DOI:10.1021/jo101756g
日期:2010.12.3
as the major product and as a single diastereoisomer after chromatography. Elaboration of this highly functionalized intermediate via ring contraction to (2S,3R,4S,5S,1′R)-N(1)-benzyl-2-chloromethyl-3-benzyloxy-4,5-epoxypiperidine followed by regioselective epoxide ring opening, functional group manipulation, and deprotection gave (+)-1-deoxyaltronojirimycin. Alternatively, resolution of (RS,RS)-N(1
在HBF 4和BnOH存在下,用m -CPBA氧化对映体纯的(R)-N(1)-1'-(1''-萘基)乙基-2,7-二氢-1 H-氮杂环庚烷,得到(3小号,4 - [R,5小号,6小号,1' - [R )- ñ(1)-1' - (1'' -萘基)乙基-3-羟基-4-苄氧基-5,6- epoxyazepane作为主要产物色谱分离后为单一非对映异构体。将此高官能度中间体通过环缩合成为(2 S,3 R,4 S,5 S,1'R)-N(1)-苄基-2-氯甲基-3-苄氧基-4,5-环氧哌啶,随后进行区域选择性环氧化物开环,官能团操纵和脱保护,得到(+)-1-脱氧altroojirimycin。或者,可拆分(RS,RS)-N(1)-苄基-3-羟基-4-苄氧基-2,3,4,7-四氢-1 H-氮杂或(3 RS,4 SR,5 RS,通过制备型手性HPLC测定6 RS)-N(1)-苄基-3-羟基-4-苄氧基-5,