Mechanochemical synthesis of aromatic sulfonamides
作者:Satenik Mkrtchyan、Viktor O. Iaroshenko
DOI:10.1039/d1cc03224k
日期:——
strategy was developed to utilise mechanical energy and accommodate primary as well as secondary aliphatic and aromatic amines to provide a new shortcut to a widerange of sulfonamides. Studies on the scope and limitations of the reaction indicated its tolerance of a vast range of functional groups and many structural patterns. The reactions were scaled up to gram quantities.
开发了一种三组分 Pd 催化的 K 2 S 2 O 5和胺与芳基溴化物或芳族羧酸的氨基磺酰化反应。开发该策略是为了利用机械能并适应伯胺和仲脂肪族和芳族胺,为各种磺胺类药物提供新的捷径。对反应范围和局限性的研究表明,它可以容忍广泛的官能团和许多结构模式。反应放大到克级。
A convenient and efficient procedure for the palladium-catalyzed cyanation of aryl halides using trimethylsilylcyanide
Benzonitriles are easily accessible from the corresponding aryl bromides catalyzed by a palladium-complex using trimethylsilylcyanide (TMSCN) as cyanating agent under mild conditions. The key of success for the cyanation protocol is the slow dosage of the TMSCN to the reaction mixture. This new method is applicable on both activated and deactivated aryl and heteroaryl bromides giving the corresponding benzonitriles
Carbon−Sulfur Bond-Forming Reductive Elimination Involving sp-, sp<sup>2</sup>-, and sp<sup>3</sup>-Hybridized Carbon. Mechanism, Steric Effects, and Electronic Effects on Sulfide Formation
作者:Grace Mann、David Baranano、John F. Hartwig、Arnold L. Rheingold、Ilia A. Guzei
DOI:10.1021/ja981428p
日期:1998.9.1
alkynyl sulfides. Reductiveeliminations forming alkenyl alkyl sulfides and aryl alkyl sulfides were the fastest. Eliminations of alkynyl alkyl sulfides were slower, and elimination of dialkyl sulfide was the slowest. Thus the relative rates for sulfide elimination as a function of the hybridization of the palladium-bound carbon follow the trend sp2 > sp ≫ sp3. Rates of reductiveelimination were faster
Trifluoromethylphenyl Palladium(II) Complexes - Synthesis and Characterization
作者:Christine Czauderna、Hanns Wurziger、Yu Sun、Werner R. Thiel
DOI:10.1002/zaac.200800336
日期:2008.10
4-Bromotrifluoromethyl benzene efficiently undergoes oxidative addition to palladium(0) precursors to give phosphine stabilized bromo(4-trifluoromethylphenyl)palladium(II) complexes in high yields. Exchange of the bromo and the phosphine ligands allows further derivatization of these compounds. The solid state structures of two palladium(II) complexes of the type (L-L)Pd(Br)(C6H4CF3), with L-L either performing
4-溴三氟甲基苯有效地与钯(0)前体进行氧化加成,以高产率得到膦稳定的溴(4-三氟甲基苯基)钯(II)配合物。溴和膦配体的交换允许这些化合物的进一步衍生化。可以阐明 (LL)Pd(Br)(C6H4CF3) 类型的两种钯 (II) 配合物的固态结构,其中 LL 进行顺式或反式配位。