3+2 CYCLOADDITION VIA A DIELS-ALDER RETRO-DIELS-ALDER SEQUENCE - TANDEM CYCLOPENTADIENYL ANNULATION OF A 1,5-CYCLOOCTADIYNE SYNTHETIC EQUIVALENT

摘要

A novel method of synthesizing a 1,2-bis(ethano) bridged bis(cyclopentadienyl) compound, 6,13-diisopropylidenetricyclo[9.3.0(1,11).0(4,8)]tetradeca-1(14),4,7.11-te traene, 5, via a tandem Diels-Alder/retro-Diels-Alder sequence using a 1,5-cyclooctadiyne synthetic equivalent and 6,6-dimethylfulvene is reported. Copyright (C) 1996 Elsevier Science Ltd [References: 28]