Aryl participated cyclisations involving indane derivatives a total synthesis of (±)-isolongifolene
摘要:
A total synthesis of (+/-)-isolongifolene (1) has been accomplished using intramolecular anionic cyclisation of the bromophenol 2 as the key step. Aryl participated intramolecular cyclisation of the diazomethyl ketones 17 and 23 provided the dienediones 18 and 24 which were stereo-selectively converted into the diketones 19 and 25 respectively.