Abstract: Disclosed are compounds of formula (I), or pharmaceutically acceptable salts thereof, pharmaceutical compositions comprising the same, and methods of treating cancer or a respiratory inflammatory disease using the same: wherein R1 is selected from hydrogen, —CH3 and —(C?O)CH(R1a)NH2; R1a is C1-C4 alkyl; Y is —(CH2)n— or —(C?O)—; n is an integer selected from 1 and 2; R2 is selected from hydrogen, —CH3 and —(C?X)R4 and R3 is hydrogen or —CH3; or R2 and R3, together with the nitrogen to which they are attached, are linked to form a 6-membered heterocyclic ring; X is NH or O; R4 is —CH3 or —[CH(R4a)]mNH2; m is an integer selected from 0 or 1; and R4a is hydrogen or C1-C6 alkyl.

Abstract: Epothilone A, epothilone B, analogs of epothilone and libraries of epothilone analogs are synthesized. Epothilone A and B are known anticancers agents that derive their anticancer activity by the prevention of mitosis through the induction and stabilization of microtubulin assembly. The analogs of epothilone are novel. Several of the analogs are demonstrated to have a superior cytotoxic activity as compared to epothilone A or epothilone B as demonstrated by their enhanced ability to induce the polymerization and stabilization of microtubules.

Abstract: Epothilone A, epothilone B, analogs of epothilone and libraries of epothilone analogs are synthesized. Epothilone A and B are known anticancers agents that derive their anticancer activity by the prevention of mitosis through the induction and stabilization of microtubule assembly. The analogs of epothilone are novel. Several of the analogs are demonstrated to have a superior cytotoxic activity as compared to epothilone A or epothilone B as demonstrated by their enhanced ability to induce the polymerization and stabilization of microtubules.

Abstract: Epothilone A, epothilone B, analogs of epothilone and libraries of epothilone analogs are synthesized. Epothilone A and B are known anticancer agents that derive their anticancer activity by the prevention of mitosis through the induction and stabilization of microtubulin assembly. The analogs of epothilone are novel. Several of the anlogs are demonstrated to have a superior cytotoxic activities as compared to epothilone A or epothilone B as demonstrated by their enhanced ability to induce the polymerization and stabilization of microtubules.

Abstract: Novel analogs of epothilone A, epothilone B, and epothilone C are synthesized by Stille coupling thazole-stannanes to macrolactone intermediates. The synthetic epothilone analogs selectively prevent mitosis in cancer cells through the induction and stabilization of microtubulin assembly. Selected synthetic epothilone analogs are demonstrated to have greater bioactivity than their corresponding native compound.