Synthesis of vinyldihydropyran by cooperative catalysis
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Delta(5)-Unsaturated aldehydes with a suitably positioned allylic halide, or phosphate, leaving group undergo doubly-catalyzed cyclization to give dihydropyran derivatives. The cyclization proceeds under the synergetic action of diazabicycloundecene and Pd(PPh3)(4). This type of transformation was also accomplished with an aryl ketone.
Keywords:dihydropyran / cooperative catalysis / cyclization / organopalladium reagents
Source:Journal of the Serbian Chemical Society, 2016, 81, 12, 1335-1343
- Serbian Chemical Soc, Belgrade