-
1.发明授权Process for the preparation of 3-trichloromethyl-5-chloro-1,2,4-thiadiazole 失效制备3-三氯甲基-5-氯-1,2,4-噻二唑的方法
公开(公告)号：US3979403A
公开(公告)日：1976-09-07
申请号：US561765
申请日：1975-03-31
IPC分类号： A01N43/836 , C07D285/08
CPC分类号： C07D285/08
摘要： A process is provided for preparing 3-trichloromethyl-5-chloro-1,2,4-thiadiazole in improved yields by reacting a defined molar excess trichloroacetamidine with trichloromethanesulfenyl chloride while controlling pH of the reaction mixture. The present process may advantageously be employed in a batch or continuous process.
摘要翻译： 提供了一种制备3-三氯甲基-5-氯-1,2,4-噻二唑的方法，通过使定义的摩尔过量的三氯乙酰脒与三氯甲烷磺酰氯反应，同时控制反应混合物的pH，从而提高产率。 本方法可有利地以间歇或连续方法使用。
-
2.发明授权
公开(公告)号：US4163753A
公开(公告)日：1979-08-07
申请号：US768330
申请日：1977-02-14
申请人： Philip M. Pivawer
发明人： Philip M. Pivawer
摘要： By reacting an aromatic compound containing at least one trichloromethyl group bonded to an aromatic carbon atom with an aliphatic acid anhydride in the presence of a catalyst, an aromatic acid chloride and an alkyl carboxylic acid chloride are produced. The desirable products are preferably obtained through distillation at ambient conditions. Although various catalysts can be employed, an acid catalyst, such as sulphuric acid is preferred.
摘要翻译： 通过在催化剂存在下使包含至少一个与芳族碳原子键合的三氯甲基的芳族化合物与脂族酸酐反应，生成芳族酰氯和烷基酰氯。 优选的产物优选通过在环境条件下蒸馏获得。 尽管可以使用各种催化剂，但优选酸催化剂，例如硫酸。
-
公开(公告)号：US3987129A
公开(公告)日：1976-10-19
申请号：US553268
申请日：1975-02-26
IPC分类号： C07F9/14
CPC分类号： C07F9/14
摘要： An improved process is disclosed for the preparation of bis(2-haloalkyl) phosphorohalidates. This process comprises the steps of reacting phosphorus trihalide with a stoichiometric excess of alkylene oxide to form tris(2-haloalkyl) phosphite, substantially eliminating the presence of unreacted alkylene oxide in the tris(2-haloalkyl) phosphite, and finally converting it to bis(2-haloalkyl) phosphorohalidate by reaction with halogen.
-
-
搜索结果
3 条记录 (耗时 0.013 秒)
