abstract |
The invention concerns a process for a degradation of an epothilone C or a epothilone D, wherein an epothilone C or epothilone D is subjected to an olefin metathesis in the presence of ethylene and subsequently an optional ester hydrolysis. The invention further concerns (2-methyl-1,3-thiazol-4-yl)-ethynyl substitued epothilones (9). Formula (9). |