(9R)-N-α-methylbenzyl-1-propyl-2,4-dimethyl-3-carbamoyl pyridinium bromide 在
sodium dithionite 、
碳酸氢钠 作用下,
以
二氯甲烷 为溶剂,
反应 4.0h,
生成
(4R)-3-(N-(R)-α-methylbenzylcarbamoyl)-1-propyl-2,4-dimethyl-1,4-dihydropyridine 、 (4S,9R)-(+)-N-α-methylbenzyl-1-propyl-2,4-dimethyl-3-carbamoyl-1,4-dihydropyridine