| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | ethyl 2,3,4-trideoxy-4-(N-ethoxycarbonyl-N-methylamino)-6-O-p-toluenesulfonyl-α-D-erythro-hex-2-enopyranoside | 92539-84-9 | C19H27NO7S | 413.492 |
Methyl 4,6-di-O-p-toluenesulfonyl-α-D-threo-hex-2-enopyranoside 4b reacts with methylamine at room temperature to displace the allylic sulfonate only, and the ethyl urethane of the resulting 4-N-methylamino sugar is cyclized with iodonium ion to give the 2-iodo-oxazolidinone, 13. This substance, upon treatment with sodium iodide in acetone, gives the 2,6-diiodide 14a. Deiodination, followed by base hydrolysis, gives the cis-hydroxyamino precursor, which upon N-acetylation and O-methylation affords the previously known holacosaminide 1b.