Semi-continuous multi-step synthesis of lamivudine

被引:21
作者
Mandala, Devender [1 ]
Chada, Sravanthi [1 ]
Watts, Paul [1 ]
机构
[1] Nelson Mandela Metropolitan Univ, Univ Way, ZA-6031 Port Elizabeth, South Africa
关键词
ACTIVE PHARMACEUTICAL INGREDIENTS; ENZYMATIC RESOLUTION; ANTI-HIV; AGENT; EMTRICITABINE; INHIBITORS; 3TC(TM); TOOL; 3TC;
D O I
10.1039/c7ob00480j
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
We report the first continuous flow synthesis of lamivudine, an antiretroviral drug used in the treatment of HIV/AIDS and hepatitis B. The key intermediate (5-acetoxy oxathiolane) was prepared by an integrated two step continuous flow process from L-menthyl glyoxalate hydrate in a single solvent, in 95% overall conversion. For the crucial glycosidation reaction, using pyridinium triflate as the novel catalyst, an improved conversion of 95% was obtained. The overall isolated yield of the desired isomer of lamivudine (40%) was improved in the flow synthesis compared to the batch process.
引用
收藏
页码:3444 / 3454
页数:11
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