作者:A. David Ward、Craig L. Francis、Natalie M. Williamson
DOI:10.1055/s-2004-831234
日期:——
4-Substituted anilines react with 1-methoxymethyl-1-butyl-3-trimethysilylpropargyl chloride but not with 1,1-dibutyl-3-trimethylsilylpropargyl chloride, to form the corresponding substituted N-propargylanilines. These anilines cyclise, using cuprous chloride, in the presence of trifluoroacetic anhydride, and, when the aniline substituent is electron donating, to give 6-substituted 2-butyl-2-methoxymethyl-1-trifluoroacetyl-1,2-dihydroquinolines. Chlorination, followed by selective dechlorination using sodium cyanoborohydride, of the 6-methyl product yields 2-butyl-2-methoxymethyl-3-chloro-6-methyl-1-trifluoroacetyl-1,2,3,4-tetrahydroquinoline which has the same relative stereochemistry as that in the antiviral compound, Virantmycin.
4-取代的苯胺与1-甲氧基甲基-1-丁基-3-三甲基硅基丙炔氯反应,但不与1,1-二丁基-3-三甲基硅基丙炔氯反应,形成相应的取代N-丙炔苯胺。这些苯胺在氯化铜的催化下,在三氟乙酸酐存在下环化,当苯胺取代基是电子供体时,产生6-取代的2-丁基-2-甲氧基甲基-1-三氟乙酰基-1,2-二氢喹啉。对6-甲基产物进行氯化,然后用氰硼氢钠选择性去氯,得到的2-丁基-2-甲氧基甲基-3-氯-6-甲基-1-三氟乙酰基-1,2,3,4-四氢喹啉的立体化学相对同抗病毒化合物Virantmycin的立体化学相同。