Synthesis of Trifluoromethyl Ketones by Palladium-Catalyzed Cross-Coupling Reaction of Phenyl Trifluoroacetate with Organoboron Compounds
作者:Ryuki Kakino、Isao Shimizu、Akio Yamamoto
DOI:10.1246/bcsj.74.371
日期:2001.2
Cross-couplingreaction of aryl trifluoroacetates with organoboron compounds catalyzed by palladiumcomplexes gives trifluoromethyl ketones in moderate to excellent yields under mild conditions. The catalytic process has been designed on the basis of fundamental studies dealing with oxidative addition of phenyl trifluoroacetate to a Pd(0) complex to give a (phenoxo)(trifluoroacetyl)palladium(II) complex
三氟乙酸芳基酯与由钯配合物催化的有机硼化合物的交叉偶联反应在温和条件下以中等至极好的产率得到三氟甲基酮。催化过程是基于三氟乙酸苯酯与 Pd(0) 络合物的氧化加成得到(苯氧基)(三氟乙酰基)钯 (II) 络合物的基础研究设计的,随后与苯基硼酸反应以释放苯基三氟甲基酮。建议催化循环由(a)酯的氧化加成得到酰基(芳氧基)钯中间体,(b)随后与芳基硼化合物的金属转移和(c)还原消除组成。钯(0)配合物,以及在室温下由乙酸钯和 3 摩尔量的三丁基膦或亚磷酸酯原位制备的催化剂,作为方便和有效的催化剂。该工艺适用于范围广泛的苯基和萘基硼酸,以提供...
Aromatic Esters of Fluorocarbon Acids
作者:Reginald F. Clark、J. H. Simons
DOI:10.1021/ja01120a507
日期:1953.12
Rozantsev,G.G. et al., Journal of general chemistry of the USSR, 1964, vol. 34, p. 3007 - 3009
作者:Rozantsev,G.G. et al.
DOI:——
日期:——
Changing Mechanisms in the β-Cyclodextrin-Mediated Hydrolysis of Phenyl Esters of Perfluoroalkanoic Acids
作者:Mariana A. Fernández、Rita H. de Rossi
DOI:10.1021/jo034402b
日期:2003.9.1
The rate of hydrolysis of esters CF(3)(CF(2))(n)COOPh (1 (n = 1), 2 (n = 2), and 3 (n = 6)) was measured at pH 6.00 and at pH higher than 9.00 in the presence of beta-cyclodextrin (beta-CD). For compounds 1 and 2 the reaction rate decreases as the beta-CD concentration increases, and they show saturation effects at all pH. It is suggested that the substrate forms an inclusion complex with cyclodextrin