The dienophilic reactivity of allenic trichloromethyl sulfoxides under ultrasound irradiation has been investigated. A considerable rate enhancement has been observed for cycloaddition of the and γ-monosubstituted allenyl trichloromethyl sulfoxides to cyclopentadiene. With the corresponding γ,γ- disubstituted allenic sulfoxides, a competing 1,2- to 1,3-diene isomerization is observed.
|Number of pages||4|
|State||Published - 23 Jul 1998|
Bibliographical noteFunding Information:
spectra. One of us (CPR) acknowledges the financial assistance from the Bar-Ilan University.