Citation:
LIU Shou-Xin, FENG Xiao, ZHEN Xiao-Li, TIAN Xia. A Novel Semi-synthesis Method for Demecolcine[J]. Chinese Journal of Applied Chemistry,
;2005, 22(5): 569-571.
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Demecolcine was synthesized from colchicine in two steps.The methylation of colchicine with iodomethane was carried out in a THF solution of potassium t-butoxide at -20℃ for 4 h.The product was isolated on a silica gel flash column with a yield of over 78%.N-Methylcolchicine was then hydrolyzed in i-propanol and aqueous solution of sodium hydroxide under refluxing temperature to give demecolcine.The overall yield was 69%.The structures of the two products were confirmed by IR and 1H NMR.
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Keywords:
- demecolcine,
- colchicine,
- semi-synthesis
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