中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (3R,4R,5R)-4-(N-tert-butyloxycarbonyl)-N-methylamino-5-methoxy-2,3-di(4-methoxybenzyl)oxyhexanoic acid | 410081-20-8 | C28H39NO9 | 533.619 |
—— | (2R,3R,4R)-4-(N-(tert-butyloxy)carbonyl-N-methyl)amino-2,3-di(4-methoxybenzyl)oxy-5-methoxy-N-(3R-((4-methoxycarbonyl)-2-oxazolyl)-1-butyl)pentamide | 410081-27-5 | C37H51N3O11 | 713.825 |
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.