Reusable and efficient polyvinylpolypyrrolidone-supported triflic acid catalyst for acylation of alcohols, phenols, amines, and thiols under solvent-free conditions
prepared and fully characterized by FT-IR, TGA, and SEM. This super acidic solid catalyst shows high catalytic activity for selective acylation of alcohols, phenols, amines, and thiols with anhydrides undersolvent-freeconditions at room temperature. In addition, this method features an easy to handle solid super acid catalyst and an operationally simple procedure, affording the desired acylated products
Ruthenium(III) Chloride Catalyzed Acylation of Alcohols, Phenols, and Thiols in Room Temperature Ionic Liquids
作者:Zhiwen Xi、Wenyan Hao、Pingping Wang、Mingzhong Cai
DOI:10.3390/molecules14093528
日期:——
Ruthenium(III) chloride-catalyzed acylation of a variety of alcohols, phenols, and thiols was achieved in high yields under mild conditions (room temperature) in the ionicliquid 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]). The ionicliquid and ruthenium catalyst can be recycled at least 10 times. Our system not only solves the basic problem of ruthenium catalyst reuse, but also avoids
The photo-fries rearrangement of 2,5-disubstituted phenyl acetates
作者:Rafael Suau、Gregorio Torres、Maria Valpuesta
DOI:10.1016/0040-4039(94)02447-j
日期:1995.2
In a homogeneous solution, the photo-Friesrearrangement of 2,5-disubstituted phenyl acetates gives ortho-hydroxyacetophenones as major photoproducts. The ortholpara ratio can be increased by using a highly viscous medium or restricted spaces such as those in zeolites. On the other hand, micellar solutions have little effect.
Gold(III)-Catalyzed Direct Acetoxylation of Arenes with Iodobenzene Diacetate
作者:Di Qiu、Zhitong Zheng、Fanyang Mo、Qing Xiao、Yu Tian、Yan Zhang、Jianbo Wang
DOI:10.1021/ol202075x
日期:2011.10.7
AuCl3-catalyzed direct acetoxylation of electron-richaromaticcompounds has been achieved with iodobenzene diacetate as the acetoxylation reagent.
用碘代苯二乙酸酯作为乙酰氧基化试剂已经实现了AuCl 3催化的富电子芳族化合物的直接乙酰氧基化。
Direct Acetoxylation of Arenes
作者:Thi Anh Hong Nguyen、Duen-Ren Hou
DOI:10.1021/acs.orglett.1c02183
日期:2021.11.5
Acetoxylation of arenes is an important reaction and an unmet need in chemistry. We report a metal-free, direct acetoxylation reaction using sodium nitrate under an anhydrous environment of trifluoroacetic acid, acetic acid, and acetic anhydride. Arenes (31 examples), with oxidation potentials (Eox, in V vs SCE) lower than benzene (2.48 V), were acetoxylated with good yields and regioselectivity. A
芳烃的乙酰氧基化是一个重要的反应,也是化学中未满足的需求。我们报告了在三氟乙酸、乙酸和乙酸酐的无水环境下使用硝酸钠进行的无金属直接乙酰氧基化反应。芳烃(31 个实例)的氧化电位(E ox,单位为 V vs SCE)低于苯(2.48 V),以良好的产率和区域选择性被乙酰氧基化。提出了一种逐步的单电子转移机制。