公开(公告)号：US4260814A

公开(公告)日：1981-04-07

申请号：US59729

申请日：1979-07-23

申请人： Jar-lin Kao ,  Ming N. Sheng

发明人： Jar-lin Kao ,  Ming N. Sheng

IPC分类号： C07C395/00 ,  C07C67/00 ,  C07C69/14 ,  C07C69/24

CPC分类号： C07C395/00 ,  C07C67/00

摘要： A process for the preparation of bromoalkyl esters and vicinal glycol esters which comprises thermally decomposing at temperatures of from 100.degree. C. to 200.degree. C. a bis(2-bromoalkyl)tellurium dicarboxylate compound of the formula ##STR1## wherein at least one R is hydrogen or R is a methyl group and R' is hydrogen or an alkyl group having 1 to 3 carbon atoms in the presence of an aliphatic monocarboxylic acid selected from formic, acetic, propionic or butyric acid employed as solvent and to facilitate solvolysis in the reaction to give in addition to the bromoalkyl ester, the vicinal glycol ester. An inert acetonitrile solvent may be employed alone to give predominately the bromoalkyl ester or an admixture with the acid may be employed. Oxygen is preferably employed with the carboxylic acid solvent to provide an increase in the mole ratio of vicinal glycol ester to the bromoalkyl ester produced.

摘要翻译： 一种制备溴烷基酯和连环二醇酯的方法，其包括在100℃至200℃的温度下分解式（II）的双（2-溴烷基）碲二羧酸酯化合物，其中至少一个R 是氢或R是甲基，R'是氢或具有1至3个碳原子的烷基，在脂肪族单羧酸的存在下，用作溶剂的甲酸，乙酸，丙酸或丁酸，并促进溶剂分解 反应得到除溴代烷基酯，邻位二醇酯外。 可以单独使用惰性乙腈溶剂，主要得到溴烷基酯或与酸的混合物。 优选与羧酸溶剂一起使用氧气以提供邻位二醇酯与所产生的溴代烷基酯的摩尔比的增加。

公开(公告)号：US4092355A

公开(公告)日：1978-05-30

申请号：US766097

申请日：1977-02-07

申请人： John Joseph Leonard ,  Jar-Lin Kao

发明人： John Joseph Leonard ,  Jar-Lin Kao

IPC分类号： C07C51/25 ,  C07C409/24 ,  C07C409/38 ,  C07C51/32 ,  C07C57/04 ,  C07C57/06 ,  C07C57/08

CPC分类号： C07C51/252 ,  C07C407/00

摘要： A method for the production of .alpha.,.beta.-unsaturated aliphatic carboxylic acids by the liquid phase oxidation of the corresponding .alpha.,.beta.-unsaturated aliphatic aldehydes, particularly acrolein and methacrolein, and the in situ decomposition of unsaturated intermediate peroxy (peroxide) compounds formed during oxidation, which comprises passing oxygen or an oxygen-containing gas through an inert solvent solution of the aldehyde at a suitable temperature and pressure in the presence of a catalytic amount of an inorganic or organic antimony salt. The solvent employed may also be mixed with water forming a heterogeneous solvent system.

摘要翻译： 通过相应的α，β-不饱和脂族醛，特别是丙烯醛和甲基丙烯醛的液相氧化生产α，β-不饱和脂肪族羧酸的方法，以及在其中形成的不饱和中间体过氧化物（过氧化物）化合物的原位分解 氧化，其包括在合适的温度和压力下，在催化量的无机或有机锑盐存在下使氧气或含氧气体通过醛的惰性溶剂溶液。 所用的溶剂也可以与形成非均相溶剂体系的水混合。