Synthesis of exocyclic cisoid dienes by Ramberg–Bäcklund rearrangement
作者:Chellan Paul Raj、Tanya Pichnit、Samuel Braverman
DOI:10.1016/s0040-4039(99)02324-2
日期:2000.3
Bicyclic and monocyclic cisoid dienes were synthesized by an amine-catalyzed Ramberg–Bäcklundrearrangement of allylic trichloromethylsulfones, in good yields.
Facile, regio and stereoselective Diels-Alder reactions of allenic trichloromethyl sulfones and sulfoxides
作者:Samuel Braverman、Zvi Lior
DOI:10.1016/s0040-4039(00)73478-2
日期:1994.9
The dienophilic reactivity of allenes is drastically increased by the powerful electron withdrawing trichloromethylsulfonyl or sulfinyl substituents. The [4+2]-cycloadditions proceed smoothly with high regio- and stereoselectivity under mild conditions. Using an optically active allenyl sulfone, transfer of chirality has been observed.