Conformation of substituted five-membered rings

✍ Scribed by Emanuele Dradi; Giuseppe Gatti

• Publisher: John Wiley and Sons
• Year: 1971
• Tongue: English
• Weight: 238 KB
• Volume: 3
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1270030411

✦ Synopsis

Proton magnetic resonance chemical shifts and coupling constants for some 5-substituted dihydrofurans, dihydrofuran and dihydrothiophene fused rings are reported, the substituents being methyl, ethyl and phenyl.

The observed coupling constants are consistent with buckled rings, in which it appears that a conformation with pseudo-equatorial substituents is predominant.