Silica-supported HgSO4/H2SO4: a convenient reagent for the hydration of alkynes under mild conditions
作者:Rossella Mello、Ana Alcalde-Aragonés、María Elena González-Núñez
DOI:10.1016/j.tetlet.2010.06.042
日期:2010.8
The silica-supported aqueous-phase catalyst (SAPC) approach has proven convenient for efficiently performing the hydration of alkynes with HgSO4/H2SO4 to give the corresponding carbonyl compounds in dichloromethane undermildconditions. The use of this solid reagent significantly improves the reaction work-up as it merely involves filtering and evaporating the solvent.
事实证明,二氧化硅负载的水相催化剂(SAPC)方法可方便地在温和条件下有效地将炔烃与HgSO 4 / H 2 SO 4进行水合,从而在二氯甲烷中生成相应的羰基化合物。该固体试剂的使用显着改善了反应后处理,因为它仅涉及过滤和蒸发溶剂。
Highly regioselective synthesis of cyclic enol silyl ethers using ring-closing metathesis
highly regioselective synthesis of cyclic enolethers from readily accessible acyclic alkenyl ketones or acyclic alkenyl silyl esters using ring-closing metathesis (RCM). The RCM of acyclic enol silyl ethers was examined using Tebbe reagent 5 or Grubbs catalyst 6 or 7 and successfully proceeded using the second generation Grubbs catalyst 7 to afford the corresponding cyclic enolethers in high yield (up