Synthesis of (±)-2R,4R,5S-2-methoxy-4-nitro-5-(2,3,4-trimethoxyphenyl)cyclohexanone and (±)-2R,4S,5R-2-methoxy-5-nitro-4-(2,3,4-trimethoxyphenyl)cyclohexanone as colchicine mimetics

Add time:08/12/2019    Source:sciencedirect.com

Colchicine mimetic (±)-4S,5R-4-nitro-5-(2,3,4-trimethoxyphenyl)cyclohexene (1) was epoxidized to afford a mixture of epoxides. The epoxides were separately converted in two steps, with high stereoselectivity, to two regioisomeric α-methoxyketones. One regioisomer, (±)-2R,4S,5R-2-methoxy-5-nitro-4-(2,3,4-trimethoxyphenyl)cyclohexanone (17), proved to be about 12-fold more potent than synthetic precursor 1 against HCT-116 tumor cells while the other regioisomer, (±)-2R,4R,5S-2-methoxy-4-nitro-5-(2,3,4-trimethoxyphenyl)cyclohexanone (16), and the synthetic intermediates tested showed no improvement in potency.

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