作者: P. S. Portoghese , D. A. Williams
关键词: Pyrolytic carbon 、 Catalytic hydrogenation 、 Envelope (waves) 、 Stereochemistry 、 Cis–trans isomerism 、 NMR spectra database 、 Nuclear magnetic resonance 、 Double bond 、 Chemistry
摘要: Pyrolytic cyclization of a- and β-methadol methiodides afforded cis trans isomers 2-ethyl-3,3-diphenyl-5-methyltetrahydrofuran, respectively. Catalytic hydrogenation 2-ethyli-dene-3,3-diphenyl-5-methyltetrahydrofuran yielded the in a 2:1 ratio. The nmr spectra these structurally related compounds have been analyzed terms half-chair conformation for 2-ethyl-5-methyl, 2-ethyl, 5-methyl derivatives. An envelope has suggested containing double bond at C-2.