摘要 一种简单方便的方法,可以从芳基(氯)甲基铵盐(最著名的是Vilsmeier-Haack试剂)和三氯乙am中生成4-芳基取代的1 H -2-(三氯甲基)-1,3-二氮杂1,3-丁二烯已经被开发出来。这些4-芳基-1 H -1,3-二氮杂丁二烯是可分离的,在硅胶色谱法中相对稳定,并且可以结晶。通过X射线衍射分析表明,在固体状态下这些1,3- diazabutadienes具有小号- cisoid构象。这些1,3-二氮杂丁二烯的主要特征是它们对缺电子乙炔的反应性,它们在温和的反应条件下反应,以高收率产生4-芳基-2-(三氯甲基)嘧啶。 一种简单方便的方法,可以从芳基(氯)甲基铵盐(最著名的是Vilsmeier-Haack试剂)和三氯乙am中生成4-芳基取代的1 H -2-(三氯甲基)-1,3-二氮杂1,3-丁二烯已经被开发出来。这些4-芳基-1 H -1,3-二氮杂丁二烯是可分离的,在
2-Trichloromethyl-4-pyrimidinyl carbamates and their use as fungicides
申请人:Olin Corporation
公开号:US04343803A1
公开(公告)日:1982-08-10
Disclosed are selected 2-trichloromethyl-4-pyrimidinyl carbamates having the formula: ##STR1## wherein X is an atom selected from the group consisting of oxygen and sulfur; R is a lower alkyl group having 1 to 4 carbon atoms or a phenyl group or R.sub.2 is --(CH.sub.2).sub.n --, where n is 4 or 5; R.sup.1 is hydrogen, a lower alkyl group having 1 to 4 carbon atoms, halo or nitro; and R.sup.2 is a lower alkyl group having 1 to 4 carbon atoms or a halo alkyl group having 1 to 4 carbon atoms. These compounds are disclosed to be agricultural fungicides.
Selected 2-trichloromethyl-4-pyrimidinyl carbonates and their use as
申请人:Olin Corporation
公开号:US04353908A1
公开(公告)日:1982-10-12
Disclosed are selected 2-trichloromethyl-4-pyrimidinyl carbonates having the formula: ##STR1## wherein X is an atom selected from the group consisting of oxygen and sulfur; R is a lower alkyl group having 1 to 4 carbon atoms or a phenyl group; R.sup.1 is hydrogen or halo; and R.sup.2 is a lower alkyl group having 1 to 4 carbon atoms. These compounds are disclosed to be agricultural fungicides.
Selected 2-trichloromethyl-4-pyrimidinyl carboxylic esters and their use
申请人:Olin Corporation
公开号:US04352806A1
公开(公告)日:1982-10-05
Disclosed are selected 2-trichloromethyl-4-pyrimidinyl carboxylic esters having the formula: ##STR1## wherein R is a lower alkyl group having 1 to 4 carbon atoms, a lower alkenyl group having 1 to 4 carbon atoms a lower halo alkyl group having 1 to 4 carbon atoms or an unsubstituted or substituted phenyl group; R.sup.1 is hydrogen or halo; and R.sup.2 is a lower alkyl group having 1 to 4 carbon atoms. These compounds are disclosed to be agricultural fungicides.
Process for the preparation of substituted trichloroacetamidine
申请人:Merck & Co., Inc.
公开号:US04065464A1
公开(公告)日:1977-12-27
Substituted trichloroacetamidine derivatives are prepared by reacting trichloroacetamidine with an appropriately substituted compound also substituted with a suitable leaving group. The leaving groups are halogen, quaternary or tertiary amines, methanesulfonate, toluenesulfonate, and the like.
New imidazolemethylphosphonium salts having a degradable group at the 2-position which are useful intermediates for preparing histamine H.sub.2 antagonists.