A convergentpairedelectrolysis catalyzed by a B12 complex for the one-pot synthesis of a tertiary amide from organic trichlorides (R-CCl3) has been developed. Various readily available organic trichlorides, such as benzotrichloride and its derivatives, chloroform, dichlorodiphenyltrichloroethane (DDT), trichloro-2,2,2-trifluoroethane (CFC-113a), and trichloroacetonitrile (CNCCl3), were converted
was developed. It provides a convenient and efficient way to synthesize amides. Based on this method, trichlorinated organic compounds were converted into amides in the presence of an amine under aerobic conditions at room temperature in a one-pot procedure. Various trichlorinated organic compounds and an amine source, such as primary, secondary, and cyclic amines, have been evaluated for this transformation
The substituent parameters for the series of mono-, di- and trisubstituted Me groups, CH2X, CHX2, and CX3 where X is F, Cl, Br, OMe, SCF3 and CN, have been determined from F19 NMR measurements on the corresponding meta- and para-fluorotoluenes. An additive linear effect of substitution is found only for the cyano substituent. A saturation effect noted for the groups where X is F, Cl, Br and SCF3 (particularly
Electronic effects of mono-, bis-,and tris-(trimethylsilyl)methyl groups. the 19F nuclear magnetic resonance spectra of m- and p-[(Me3Si)xCH(3-x)]C6H4F compounds (x = 0-3)
作者:A.R. Bassindale、C. Eaborn、D.R.M. Walton
DOI:10.1016/s0022-328x(00)90597-7
日期:1970.1
The 19F NMR spectra of m- and p-[(Me3Si)xCH(3-x)]C6H4F (x = 0-3) compounds have been recorded. The σ1 and σUR constants for the (Me3Si)xCH(3-x) groups which can be derived from the 19F chemical shifts are of doubtful validity, and the results suggest this method of obtaining σ1 and σUR constants may not be applicable to substituents of this type.
记录了m-和p -[(Me 3 Si)x CH (3-x) ] C 6 H 4 F(x = 0-3)化合物的19 F NMR光谱。的σ 1和σ Ü - [R为(ME常数3 Si)的X CH (3-x)的可从被衍生的基团19个˚F化学位移是值得怀疑的有效性,结果表明获得σ的这种方法1和σ U R常数可能不适用于这种类型的取代基。
Processes for producing 5-fluorobenzoic acids and their intermediates
申请人:Asahi Glass Company Ltd.
公开号:US05241111A1
公开(公告)日:1993-08-31
A process for producing a 5-fluorobenzoic acid of the formula (V), which comprises trichloromethylating a fluorobenzene of the formula (I) to obtain a 5-fluorobenzotrichloride of the formula (II), then reacting it with aqueous ammonia to obtain a 5-fluorobenzonitrile of the formula (III), reacting it with a fluorinating agent to obtain a 5-fluorobenzonitrile of the formula (IV) and hydrolyzing it: ##STR1## wherein each of X.sub.1, X.sub.3, Y.sub.1 and Y.sub.3 is a halogen atom, and each of X.sub.2 and Y.sub.2 is hydrogen or a halogen atom.