中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (R)-benzyl 2-methyl-4-oxobutanoate | 116492-52-5 | C12H14O3 | 206.241 |
(R)-甲基丁二酸 1-苄酯 | benzyl (R)-2-methyl-4-pentenoate | 143225-28-9 | C12H14O4 | 222.241 |
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.