methoxycarbonyl-vallesiachotamine and its 20-desethyl analogue has been carried out by sodium dithionite reduction of appropriate 1-[2-(3-indolyl)ethyl]-3-methoxycarbonyl pyridinium salts to the corresponding 1,4-dihydropyridine derivatives, followed by acid-induced cyclization.
通过
连二亚硫酸钠还原适当的1- [2-(3-
吲哚基)
钠,进行(±)-19,20-二氢-20-去甲酰基-20-甲氧基羰基-缬草胺和其20-去乙基类似物的立体有择的全合成。乙基] -3-甲氧基羰基
吡啶鎓盐形成相应的1,4-二氢
吡啶衍生物,然后进行酸诱导的环化反应。