作者:Bollipalli Nagarjuna、Barla Thirupathi、Chunduri Venkata Rao、Debendra K. Mohapatra
DOI:10.1016/j.tetlet.2015.06.084
日期:2015.8
Four stereoisomers of centrolobine, (3R,7S)-(−)-centrolobine (1), (3S,7S)-(−)-epi-centrolobine (2), (3S,7R)-(+)-centrolobine (3), and (3R,7R)-(+)-epi-centrolobine (4) have been achieved in an efficient manner in 24–28% overall yield over 9–10 linear steps starting from cheap and commercially available 4-methoxybenzaldehyde following chemoenzymatic protocol. The key features of this synthetic protocol
中央lob素的四个立体异构体,(3 R,7 S)-(-)-中央ine素(1),(3 S,7 S)-(-)- epi- centrolobine(2),(3 S,7 R)-( +) - centrolobine(3),和(3 - [R,7 - [R )- (+) -外延-centrolobine(4)已成功地以9-10个线性步骤以24-28%的总收率实现,从化学方法开始的廉价和市场上可买到的4-甲氧基苯甲醛开始。该合成方案的关键特征是酶促拆分,交叉复分解(CM),以及我们自己开发的串联异构化反应,然后进行C–O和C–C键形成反应。