Air-Tolerant Direct Thiol Esterification with Carboxylic Acids Using Hydrosilane via Simple Inorganic Base Catalysis
作者:Maojie Xuan、Chunlei Lu、Meina Liu、Bo-Lin Lin
DOI:10.1021/acs.joc.9b00500
日期:2019.6.21
thioesterification of carboxylicacids with thiolsusing nontoxic activation agents is highly desirable. Herein, an efficient and practical protocol using safe and inexpensive industrial waste polymethylhydrosiloxane as the activation agent and K3PO4 with 18-crown-6 as a catalyst is described. Various functional groups on carboxylicacid and thiol substituents can be tolerated by the present system to afford thioesters
非常需要使用无毒的活化剂将羧酸与硫醇直接硫酯化。在此,描述了一种有效且实用的方案,该方案使用安全且廉价的工业废聚甲基氢硅氧烷作为活化剂,并以18-crown-6作为催化剂的K 3 PO 4。本系统可以耐受羧酸和硫醇取代基上的各种官能团,从而以19-100%的收率提供硫酯。
S-Acetylation of Thiols Mediated by Triflic Acid: A Novel Route to Thioesters
作者:Krzysztof Kuciński、Grzegorz Hreczycho
DOI:10.1021/acs.oprd.7b00378
日期:2018.4.20
and aliphatic thiols using isopropenyl acetate as a cheap and convenient acetylating agent. During our tests, we also investigated the differences between the activities of metal triflates and triflic acid as catalysts in the acetylation of thiols. Finally, the potential of our concept has been increased by the implementation of Nafion as a heterogeneous catalyst for S-acetylation of thiols.
Thioesters as Bifunctional Reagents for 2‐Naphthylamine Sulfuracylation
作者:Fuhong Xiao、Shanshan Yuan、Dahan Wang、Saiwen Liu、Huawen Huang、Guo‐Jun Deng
DOI:10.1002/adsc.201900301
日期:2019.7.11
An efficient and convenient strategy for the preparation of diaryl sulfides via a Fe‐promoted direct sulfuracylation of 2‐naphthylamine using thioesters as bifunctional reagents is described. This synthetic strategy features high chemoselectivity, good substrate scope and functional group tolerance.
and spectroscopic (ICP-EOS, XPS) analysis tools. The metal composite was effectively employed in the unprecedented heterogeneously Ni-assisted cross-coupling reaction of aryl/vinyl iodides and thiocarboxylates. A range of sulfur-containing aryl as well as vinylderivatives (15 examples) was achieved in high yields (up to 82%), under mild reaction conditions, and with wide functional group tolerance
制备了一种新型的无配体镍纳米颗粒支撑在 rGO 上(平均粒径分布 d = 9 ± 3 nm),并通过形态学 (Fe-SEM)、结构学 (P-XRD、HR-TEM) 和光谱学进行了充分表征(ICP-EOS, XPS) 分析工具。该金属复合物有效地用于芳基/乙烯基碘化物和硫代羧酸盐的前所未有的非均相 Ni 辅助交叉偶联反应。在温和的反应条件和广泛的官能团耐受性下,以高产率(高达 82%)获得了一系列含硫芳基和乙烯基衍生物(15 个实例)。