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