Stereochimie et mecanisme de l'ouverture par les amines d'ions N-alcoxypyridinium
作者:H. Sliwa、A. Tartar
DOI:10.1016/0040-4020(79)80072-1
日期:1979.1
with irreversible cyclization of an ylide to the bicyclic intermediate 3 which suffers subsequent ring opening to 3-ω-aminobutadienylisoxazol-4 ones in methanol. The different courses of the reaction is tentantively explained by means of HSAB theory. Stereochemistry of the primary open products is consistent with a disrotatory ring opening of cis-dihydropyridine adducts resulting from amine addition to