Synthesis and spectroscopic properties of azuleno[1,2-g]tricyclo[4.3.1.01,6]deca-5b,7,9-triene derivatives. A nevel cycloheptatriene structure bearing a three carbon bridge at the C1C6 position
摘要:
13-Trifluoroacetyl- and 13-methoxycarbonylazuleno[1,2-g]tricyclo[4.3.1.0(1,6)]deca-5b,7,9-trienes were synthesized, and the C-13 NMR spectra revealed that the former exists in a norcaradiene structure, while the latter is in equilibrium between norcaradiene and cycloheptatriene. (C) 1997 Elsevier Science Ltd.