The [3,3]-sigmatropic rearrangement took place smoothly during the course of trifluoroacetylation of O-phenyloxime at below room temperature to give the dihydrobenzofuran or benzofuran as a result of concomitant cyclization.
在室温以下对 O-苯基
肟进行三
氟乙酰化的过程中,[3,3]-三向异构重排顺利进行,同时环化得到二氢
苯并呋喃或
苯并呋喃。