Mono- and bishomobenzotropones. 2. Preparation and nuclear magnetic resonance spectra of 1-hydroxy-2,3-benzotropylium cation, 1-hydroxy-2,3-benzohomotropylium cation, 1-hydroxy-2,3-benzobishomotropylium cation and their deuterated analogs
Mono- and bishomobenzotropones. 1. Synthesis and nuclear magnetic resonance spectra of 2,3-benzo-6,7-monohomotropone and 2,3-benzo-trans-4,5:6,7-bishomotropone