A simple, base-free preparation of S-aryl thioacetates as surrogates for aryl thiols
作者:Adri van den Hoogenband、Jos H.M. Lange、Raymond P.J. Bronger、Axel R. Stoit、Jan Willem Terpstra
DOI:10.1016/j.tetlet.2010.10.125
日期:2010.12
A mild method for the preparation of S-aryl thioacetates by hetero cross-coupling reactions of aryl bromides or aryl triflates with potassium thioacetate is described. The reaction proceeded smoothly in toluene at 110 °C, mediated by catalytic Pd2(dba)3 in combination with CyPF-tBu as the ligand. Neither the presence of a base nor microwave conditions were required. The formed S-aryl thioacetate proved
描述了通过芳基溴化物或芳基三氟甲磺酸酯与硫代乙酸钾酯的杂交联反应制备S-芳基硫代乙酸酯的温和方法。反应在110°C的甲苯中顺利进行,这是由催化性Pd 2(dba)3与CyPF- t Bu作为配体的结合介导的。既不需要存在碱也不需要微波条件。形成的S-芳基硫代乙酸酯证明在快速色谱条件下稳定,在温和的碱性条件下可以快速转化为相应的硫醇。
Efficient preparation of S-aryl thioacetates from aryl halides and potassium thioacetate
作者:Chunqiu Lai、Bradley J. Backes
DOI:10.1016/j.tetlet.2007.02.128
日期:2007.4
A method for the preparation of S-aryl thioacetates using palladium-mediated couplings of aryl bromides and aryl triflates with potassium thioacetate as an inexpensive thiol source was developed. Electron withdrawing groups, electron donating groups and heterocyclic substrates were tolerated in the reaction conditions, affording the corresponding products in good to excellent yields. This method was applied to the preparation of novel sulfone-containing DPP-IV inhibitors. (c) 2007 Elsevier Ltd. All rights reserved.