中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
3-反-溴碳-2,2'-二甲基氧酸酯 | (4S)-4-formyl-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester | 102308-32-7 | C11H19NO4 | 229.276 |
(R)-(+)-3-Boc-2,2-二甲基恶唑啉-4-甲醛 | (R)-3-tert-butoxycarbonyl-4-formyl-2,2-dimethyloxazolidine | 95715-87-0 | C11H19NO4 | 229.276 |
The formal total synthesis of the marine metabolite (+)-calyculin A is reported. The key steps involve (i) the use of Brown allylboration chemistry to control the relative and absolute stereochemistry of homoallylic alcohol arrays, thus setting eight of the desired stereocenters; (ii) Stille coupling methodology in the construction of the cyano tetraene unit of the natural product; and (iii) a modified CornforthMeyers approach to the synthesis of the oxazole fragment.Key words: calyculin, marine natural product, phosphatase inhibitor, total synthesis, palladium catalyzed coupling reactions, allylboration reactions, aldol reactions, spiroketal, CornforthMeyers oxazole reaction.