The intramolecular condensation of o-acyloxybenzylidenetriphenylphosphoranes leads to acylated products in t-BuOH and to benzofurans in toluene. Mechanistic aspects are discussed. A general method is described for the synthesis of benzofurans from o-cresols, o-hydroxybenzylic alcohols, and deactivated phenols.
邻-酰氧基亚苄基三苯基
苯基膦的分子内缩合导致在t- BuOH中的酰化产物和在
甲苯中的
苯并呋喃。讨论了机械方面。的一般方法是为
苯并呋喃的从合成所述Ò -cresols,ø -hydroxybenzylic醇,和失活的
酚。