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Unformatted text preview: J. Antibiot. 1985 , 490. O O O O Me Me + [2+2] cycloaddition O O CONH 2 O HO H H Echinosporin O OH HO H H HO 2 C CONH 2 HO H H HO 2 C O O O lactone formation O O CO 2 Me Me Me OH L-methyl threonate O O OH HO HO OH H vitamin C (L-ascorbic acid) retro-aldol "DeMayo Cycloaddition"...
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This note was uploaded on 01/03/2012 for the course CH 242a taught by Professor List during the Fall '10 term at Caltech.
- Fall '10