Synthetic Applications of Baylis-Hillman Chemistry: An Efficient and Solely Stereoselective Synthesis of (E)-.ALPHA.-Methylcinnamic Acids and Potent Hypolipidemic Agent LK-903 from Unmodified Baylis-Hillman Adducts
作者:Biswanath Das、Joydeep Banerjee、Nikhil Chowdhury、Anjoy Majhi
DOI:10.1248/cpb.54.1725
日期:——
An efficient and solely stereoselective synthesis of (E)-α-methylcinnamic acids has been accomplished in single pot by reduction of the unmodified Baylis–Hillman adducts, methyl-3-hydroxy-3-aryl-2-methylenepropanoates with I2/NaBH4 reagent system at room temperature followed by hydrolysis. The efficacy of this method has been proved in the total synthesis of 1-[p-(myristyloxy)-α-methylcinnamoyl]glycerol, LK-903, a highly active hypolipidemic agent.
通过在室温下用I2/NaBH4试剂系统还原未改性的Baylis-Hillman加合物(甲基-3-羟基-3-芳基-2-亚甲基丙酸甲酯),然后进行水解,在单罐中实现了(E)-α-甲基肉桂酸的高效且完全立体选择性合成。这种方法的有效性已在1-[p-(肉豆蔻氧基)-α-甲基肉桂酰]甘油(LK-903)的全合成中得到证实,这是一种高活性的降血脂剂。