Synthesis of New Tricyclic Phosphines and Phosphinites by Intramolecular Diels−Alder Reactions of Trivalent Phospholes
作者:E. Mattmann、F. Mercier、L. Ricard、F. Mathey
DOI:10.1021/jo025713+
日期:2002.7.1
Phospholes bearing an allyl-X substituent at phosphorus tend to undergo an intramolecular Diels-Alder cycloaddition (IMDA) leading to the corresponding tricyclic derivative. When X = O or NR, the IMDA easily takes place at room temperature. When X = CH2, the IMDA slowly takes place around 110-140 degrees C, as a function to the substitution pattern of the dienic system. Two tricyclic derivatives (X
在磷上带有烯丙基-X取代基的磷脂易于发生分子内Diels-Alder环加成反应(IMDA),从而生成相应的三环衍生物。当X = O或NR时,IMDA很容易在室温下发生。当X = CH2时,IMDA缓慢地在110-140摄氏度左右发生,这是二烯体系取代模式的函数。通过对P-硫化物的X射线晶体结构分析,已表征了两个三环衍生物(X = O和CH2)。