ethyl 3,5-bis(3-(dimethylamino)prop-2-en-1-ylidene)-4-oxopiperidine-1-carboxylate 、
硫酸二甲酯 以
二氯甲烷 为溶剂,
反应 7.0h,
以94%的产率得到N-{3-[3-(3-(dimethylamino)prop-2-en-1-ylidene)-1-ethoxycarbonyl-4-methoxy-1,2,3,6-tetrahydropyridin-5-yl]prop-2-en-1-ylidene}-N,N-dimethylammonium methyl sulfate