InCl<sub>3</sub>-Catalyzed Synthesis of 1,2-Dimetallic Compounds by Direct Insertion of Aluminum or Zinc Powder
作者:Tobias D. Blümke、Thomas Klatt、Konrad Koszinowski、Paul Knochel
DOI:10.1002/anie.201205169
日期:2012.9.24
In‐sertion of metal: Catalytic amounts of InCl3 allow the insertion of aluminum and zinc into aromatic 1,2‐dibromides or 1,2‐bromotriflates (see scheme). These 1,2‐dimetallic species can undergo Cu or Pd‐catalyzed acylations, allylations, or cross‐couplings.
Manganese(<scp>iii</scp>)-promoted thiocarbonylation of alkylborates with disulfides: synthesis of aliphatic thioesters
作者:Bo Chen、Xiao-Feng Wu
DOI:10.1039/d1ob01960k
日期:——
A Mn(III)-promoted thiocarbonylation procedure toward the synthesis of thioesters has been developed. By employing easily available disulfides and potassium alkyltrifluoroborates as the starting materials, and cheap and non-toxic Mn(OAc)3·2H2O as the promotor, a broad range of thioesters were synthesized in good to excellent yields via radical intermediates.
已开发出一种用于合成硫酯的 Mn( III ) 促进的硫代羰基化过程。以易得的二硫化物和烷基三氟硼酸钾为起始原料,以廉价且无毒的Mn(OAc) 3 ·2H 2 O为促进剂,通过自由基中间体以良好至优异的产率合成了多种硫酯。
A FACILE SYNTHESIS OF CARBOXYLIC THIOL ESTERS FROM CARBOXYLIC ACIDS AND THIOLS
Various thiolesters are prepared in good yields by the reaction of thiols with acyloxypyridinium salts formed in situ from free carboxylic acids and 2-fluoro-1-methylpyridinium p-toluenesulfonate.
A simple synthesis of thiol esters from copper-I-mercaptides and acyl chlorides
作者:Hans-Ulrich Reißig、Bernadette Scherer
DOI:10.1016/s0040-4039(00)92877-6
日期:1980.1
Thiol esters are obtained from acylchlorides and copper-I-mercaptides in excellent yields.
从酰氯和铜-I-硫醇盐以优异的产率获得硫醇酯。
Kinetics and mechanism of the aminolysis of S-phenyl cyclopropanecarboxylates in acetonitrile
作者:Hyuck Keun Oh、Jae Yun Lee、Hai Whang Lee、Ikchoon Lee
DOI:10.1039/b107403m
日期:2002.4.2
The kinetics and mechanism of the aminolysis of S-phenyl cyclopropanecarboxylates [cyclo-C3H5C(O)SC6H4Z] with benzylamines (XC6H4CH2NH2) were investigated in acetonitrile at 35.0°C. The large magnitudes of the Brönsted coefficients βX (1.7–2.3) and βZ (−0.9 to −1.3), together with a large positive cross-interaction constant ρXZ=+1.4, are interpreted to indicate a stepwise mechanism with rate-limiting
研究了S-苯基环丙烷羧酸酯[环-C 3 H 5 C(O)SC 6 H 4 Z]与苄胺(XC 6 H 4 CH 2 NH 2)的氨基分解动力学和机理。乙腈在35.0 °C下。布朗斯台德系数的大幅值β X (1.7-2.3)和β Ž (-0.9 -1.3),具有大的正横相互作用常数一起ρ XZ = 1.4,被解释为指示与速率-逐步机构两性离子四面体中间体T ±的极限分解。速率遵守反应选择性原则(RSP)可以支持所提出的机制。涉及氘化苄胺(XC 6 H 4 CH 2 ND 2)的动力学同位素效应大于一(k H / k D> 1.0),表明存在氢键四中心过渡态的可能性。这激活参数ΔH ≠ (≅5kcal mol -1)和ΔS ≠ (= -45至-54 eu)与该过渡态结构一致。