中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 1,3,7-tris-(tert-butyl-dimethyl-silanyloxy)-11-hydroxy-4,4,6,8-tetramethyl-undecan-5-one | 914455-94-0 | C33H72O5Si3 | 633.188 |
—— | 11-azido-1,3,7-tris-(tert-butyl-dimethyl-silanyloxy)-4,4,6,8-tetramethyl-undecan-5-one | 914455-95-1 | C33H71N3O4Si3 | 658.201 |
—— | (3S,6R,7S,8S)-11-(benzyloxy)-1,3,7-tris{[(tert-butyl)dimethylsilyl]oxy}-4,4,6,8-tetramethylundecan-5-one | 279227-06-4 | C40H78O5Si3 | 723.313 |
12-Aza-epothilones ('Azathilones') 1 and 2 have been prepared through ring-closing olefin metathesis or macrolactonization-based cyclization reactions. While RCM of the respective dienes 9 and 12 was found to be very effective and produced macrocyclic olefins with high E selectivity, the subsequent reduction of the 9,10-double bond proved to be unexpectedly difficult and low-yielding. Preparation of azathilone 2 was also accomplished via macrolactonization and this approach was found to be more effective. Compound 2 is a highly potent inhibitor of human cancer cell growth in vitro. The activity of this analog is comparable with that of Epo A, both in terms of cytotoxicity against drug-sensitive human cancer cells as well as its tubulin-polymerizing activity. However, in contrast to Epo A, 2 is considerably less potent against multidrug-resistant cancer cells.