We have developed an efficient synthetic method for 3-substituted 3-cyclohexenols and -cyclopentenol based on Pd0-catalyzed alkylative, arylative, alkenylative, alkynylative, and borative cyclization reaction of allene-carbonyl compounds. Microwave irradiation increases not only the reaction rate but also the product yield by suppressing formation of hydroarylation byproducts observed in the same catalytic system. Cyclization of optically active 1,3-disubstituted allene aldehyde reveals that the reaction proceeds not through carbopalladation but through "anti-Wacker"-type oxidative addition.
ASJC Scopus subject areas
- Colloid and Surface Chemistry