Mechanisms of thermal migrations of allyl and benzyl groups in methylenecyclohexadienes

✍ Scribed by Bernard Miller; Kwo-Hrong Lai

• Publisher: Elsevier Science
• Year: 1971
• Tongue: French
• Weight: 196 KB
• Volume: 12
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(01)87416-5

✦ Synopsis

AND BENZYL GROUPS and Kwo-Hrong Lai of Massachusetts, INMETRYLENECYCLGNEKADIES Amherst, Mass. 01002 (Received in USA 29 March 1971; received in UK for publication 5 April 1971) Polyhalomethyl Groups at the quaternary carbons of cross-conjugated methylenecyclohexadienes ("semibenzenes" ia) undergo formal 1,5-shifts to the exocyclic methylene groups when heated to temperatures near 100° (e.g., _ l?r 2).1 _ A methyl group in semibenzene 2 undergoes a similar l.R = H-Cl -