Synthesis of optically active hydroxyalkylpyridines and related pyridyl amines
摘要:
2-(1-Hydroxyalkyl)pyridines have been prepared by cobalt(I)-catalyzed cocyclotrimerization reaction of O-protected alpha-hydroxynitriles with acetylene. From these compounds the related pyridyl amines have been obtained.
A practical two-step procedure for the preparation of enantiopure pyridines: Multicomponent reactions of alkoxyallenes, nitriles and carboxylic acids followed by a cyclocondensation reaction
作者:Christian Eidamshaus、Roopender Kumar、Mrinal K Bera、Hans-Ulrich Reissig
DOI:10.3762/bjoc.7.108
日期:——
reaction of alkoxyallenes, nitriles and carboxylicacids to provide beta-methoxy-beta-ketoenamides which are transformed into 4-hydroxypyridines in a subsequent cyclocondensation. The process shows broad substrate scope and leads to differentially substituted enantiopure pyridines in good to moderate yields. The preparation of diverse substituted lactic acid derived pyrid-4-yl nonaflates is described