温控相转移催化新体系中 α,β-不饱和酮的常压加氢反应

A novel thermoregulated phase-transfer(TPT)catalysis system composed of H₂O,1-hexanol and Ru nanocatalyst(Ru_nano catalyst)was developed and utilized for the selective hydrogenation of chalcone at atmospheric H₂ pressure. Under the optimal circumstances,both the conversion of chalcone and the selectivity for the product of C==C double bond hydrogenation from chalcone were above 99%. The Ru_nano catalyst is conveniently separable from product and directly recycled six times with conversion and selectivity remaining unchanged. The turnover frequency(TOF)was higher than that of previously reported Ru_nano catalyst and the leaching of Ru was further reduced. In addition,this novel TPT catalysis system was also extended to the atmospheric hydrogenation of other α,β-unsaturated ketones with >99% conversion and selectivity.