The synthesis of polarofacial spacer molecules: a new twist in the coupling of ring strained olefins with oxadiazoles.
摘要:
New approaches to the synthesis of rigid spacer molecules in which an oxygen-bridge bestows the facial polarity is described: attempts to couple 7-oxanorbornenes together using 1,3,4-oxadiazoles yields inverted, non linear products in a stereospecific reaction which differs significantly from that known to obtain with norbornenes.