A chromatography-free and aqueous waste-free process for thioamide preparation with Lawesson’s reagent
作者:Ke Wu、Yichen Ling、An Ding、Liqun Jin、Nan Sun、Baoxiang Hu、Zhenlu Shen、Xinquan Hu
DOI:10.3762/bjoc.17.69
日期:——
After completing the thio-substitution with Lawesson’sreagent, ethanol was found to be effective in the decomposition of the inherent stoichiometric six-membered-ring byproduct from the Lawesson’sreagent to a highly polarized diethyl thiophosphonate. The treatment significantly simplified the following chromatography purification of the desired thioamide in a small scale preparation. As scaling up
Identification of a Highly Efficient Alkylated Pincer Thioimido-Palladium(II) Complex as the Active Catalyst in Negishi Coupling
作者:Jing Liu、Haibo Wang、Heng Zhang、Xiaojun Wu、Hua Zhang、Yi Deng、Zhen Yang、Aiwen Lei
DOI:10.1002/chem.200802238
日期:2009.4.20
PdII ate complex: A novel alkylatedpincer thioimido–Pd complex generated from a catalyst precursor and basic organometallic reagents (RM) was observed by in situ IR, 1H NMR, and 13C NMR spectroscopies for the first time and proved to be the activecatalyst in stoichiometric and catalytic reactions of aryl iodides with RM (see scheme). The catalyst, as an electron‐rich PdII species, promoted the Negishi
钯II 根型配合物:一种新颖的烷基化的钳形thioimido -钯复合物通过原位IR,观察到从的催化剂前体和基本的有机金属试剂(RM)产生1 H NMR,和13个首次C NMR光谱以及被证明是活性催化剂用于芳基碘化物与RM的化学计量和催化反应(请参阅方案)。作为富电子的Pd II物种,该催化剂即使在低温(0或-20°C)下也能高效地促进芳基碘化物和烷基锌试剂的Negishi偶联。