Chemical Aspects of Propranolol Metabolism: 1,1-Diethoxy-3-(1-naphthoxy)-2-propanol and Related Ring-Closure Products cis- and trans-4-Ethoxy-3-hydroxy-3,4-dihydro-2H-naphtho[1,2-b]pyran
作者:Ching-Hsiu Chen、Wendel L. Nelson
DOI:10.1002/jps.2600720807
日期:1983.8
reaction of the lithium salt of methyl methylsulfinylmethyl sulfide with 2-(1-naphthoxy)-acetaldehyde. Compound X, as a mixture of three diastereomeric alpha-hydroxydithioacetal derivatives, when treated with ethyl orthoformate afforded the desired acetal V as well as two ring-closure products, the dihydronaphtho[1,2-b]pyrans VI and VII. Compounds VI and VII were characterized on the basis of mass
1,1-二乙氧基-3-(1-萘氧基)-2-丙醇(V)是普萘洛尔的代谢N-去甲酰基化反应中重要的醛中间体的二乙缩醛,由化合物X制备。甲基亚磺酰基甲基硫醚的锂盐与2-(1-萘氧基)-乙醛的反应 当用原甲酸乙酯处理时,化合物X为三种非对映体α-羟基二硫缩醛衍生物的混合物,得到所需的乙缩醛V以及两个闭环产物二氢萘并[1,2-b]吡喃VI和VII。根据质谱以及1H-和13C-NMR数据对化合物VI和VII进行表征。这些化合物的立体化学是根据其乙酸酯(XI和XII)的300-MHz 1H-NMR光谱确定的。