Preparation of 2-Substituted 3-Hydroxypyridines and Direct Conversion of 2-Furyl Ketone into a Perhydroazulene
作者:Steven M. Bromidge、David A. Archer、Peter G. Sammes
DOI:10.1055/s-1992-26187
日期:——
2-Acylfurans can be converted directly into 2-substituted 3-hydroxypyridines by heating them with ammonia; 2-acylpyrroles and 3-aminopyridines are formed as byproducts in this rearrangement. Using propylamine in place of ammonia, 1-(2-furyl)-5-methylhex-5-en-1-one (8) could be rearranged to give the aza-bridged perhydroazulenone (5-methyl-10-oxo-11-propyl-11-azatricyclo-[5.3.1.01,5]undec-8-ene, 10).
2-酰基呋喃与氨加热后,可以直接转化为2-取代3-羟基吡啶;2-酰基吡咯和3-氨基吡啶是这种重排反应的副产物。用丙胺代替氨,1-(2-呋喃基)-5-甲基-5-己烯-1-酮(8)可以重排为氮桥全氢化吖啶酮(5-甲基-10-氧代-11-丙基-11-氮杂三环-[5.3.1.01,5]十一碳-8-烯,10)。