Cobalt-catalyzed annulation of styrenes with α-bromoacetic acids
作者:Tung T. Nguyen、Bao H. T. Ngo、Huy X. Le、Linh N. P. Vu、Tuong A. To、Anh N. Q. Phan、Nam T. S. Phan
DOI:10.1039/d0ra09588e
日期:——
We report a method for addition of α-bromophenylacetic acids to vinyl CC bonds in styrenes to afford γ-lactones. Reactions employed a simple cobalt catalyst Co(NO3)2·6H2O in the presence of dipivaloylmethane (dpm) ligand. Many functionalities including halogen, ester, and nitro groups were compatible with reaction conditions. If α-bromoesters were used, vinylacetates were the major products.
我们报告了一种将 α-溴苯乙酸添加到苯乙烯中的乙烯基 C C 键以提供 γ-内酯的方法。在二戊酰甲烷 (dpm) 配体存在下,反应使用简单的钴催化剂 Co(NO 3 ) 2 ·6H 2 O。许多官能团,包括卤素、酯和硝基,都与反应条件相容。如果使用 α-溴代酯,醋酸乙烯酯是主要产品。
β-AROYL-α- AND -β-ARYLPROPIONIC ACIDS: PART I. THEIR PREPARATION AND LACTONIZATION
作者:Sayed Sherif
DOI:10.1139/v61-338
日期:1961.12.1
β-p-bromobenzoyl-α- and -β-phenyl-propionic acid, and a mixture of β-p-bromobenzoyl-α- and -β-p-hydroxyphenylpropionic acid, respectively.Similarly, iodobenzene reacts with the same anhydrides to give a mixture of β-p-iodobenzoyl-α- and -β-phenylpropionic acid and β-benzoyl-α- and -β-phenylpropionic acid, and a mixture of β-benzoyl- and β-p-iodobenzoyl-α-p-methoxyphenylpropionic acid, respectively.Phenyl- and diphenyl-succinic
Electrocarboxylation of Alkynes with Carbon Dioxide in the Presence of Metal Salt Catalysts
作者:Chuanhua Li、Gaoqing Yuan、Huanfeng Jiang
DOI:10.1002/cjoc.201090285
日期:2010.9
With some common metal salts (CuI, FeCl3) as catalysts, alkynes can be effectively electrocarboxylated with CO2 (4 MPa) in an undivided cell with Ni cathode and Al sacrificial anode containing n‐Bu4NBr‐DMF as supporting electrolyte with a constant current at room temperature. The saturated tricarboxylic acids besides the dicarboxylic acids were obtained in good yields. The yields of the tricarboxylic
使用某些常见的金属盐(CuI,FeCl 3)作为催化剂,炔烃可在不分隔的单元中有效地被CO 2(4 MPa)电羧化,该单元具有Ni阴极和Al牺牲阳极,其中n - Bu 4 NBr-DMF作为辅助电解质,n在室温下保持恒定电流。除了二羧酸之外,还以良好的产率获得了饱和的三羧酸。三羧酸的收率受到各种金属盐催化剂,阴极材料和取代基性质的强烈影响。最后,讨论了可能的电化学机理。
Verkade; Hartman, Recueil des Travaux Chimiques des Pays-Bas, 1933, vol. 52, # 960, p. 965
作者:Verkade、Hartman
DOI:——
日期:——
Wren; Still, Journal of the Chemical Society, 1918, vol. 113, p. 837