申请人:Bayer Aktiengesellschaft
公开号:US03931311A1
公开(公告)日:1976-01-06
Novel N,N',N'-trisubstituted N-halogenomethylurea compounds of the formula: ##EQU1## in which R.sup.1 is alkyl, cycloalkyl, cycloalkenyl, bicycloalkyl, bicycloalkenyl, aryl or aralkyl (each of which may be optionally substituted), R.sup.2 is alkyl, alkenyl, alkynyl or alkoxy (each of which may be optionally substituted), or halogenoalkyl or cycloalkyl, R.sup.3 is alkyl (which may be optionally halogen-substituted), alkenyl or alkynyl, or R.sup.2 and R.sup.3 jointly represent an alkylene bridge which, can be interrupted by one or more hetero-atoms, such as S or O, or by the NH group, and which forms a heterocyclic ring with the adjoining nitrogen atom, X is oxygen or sulfur, and Y is chlorine or bromine. Are prepared by reacting a N,N',N'-trisubstituted urea or thiourea of the general formula: ##EQU2## in which R.sup.1, R.sup.2, R.sup.3 and X have the above-mentioned meanings, is reacted, per mole thereof, with at least 1 mole of formaldehyde (which may be formed in situ from a formaldehyde-releasing substance) and a halogenating agent at a temperature of from -10.degree. to +150.degree.C, optionally in the presence of a diluent and, as a catalyst, a proton-releasing compound (for example a hydrogen halide) or a Lewis acid.
用以下化学式表示的新型N,N',N'-三取代N-卤代甲基脲化合物:其中R.sup.1是烷基,环烷基,环烯基,双环烷基,双环烯基,芳基或芳基烷基(每个都可以选择性地被取代),R.sup.2是烷基,烯基,炔基或烷氧基(每个都可以选择性地被取代),或卤代烷基或环烷基,R.sup.3是烷基(可以选择性地被卤素取代),烯基或炔基,或者R.sup.2和R.sup.3共同代表可以被一个或多个杂原子(例如S或O)或NH基所打断的烷基桥,与相邻的氮原子形成杂环戒,X是氧或硫,Y是氯或溴。通过将一种具有通用式的N,N',N'-三取代脲或硫脲:其中R.sup.1,R.sup.2,R.sup.3和X具有上述所述的含义,与至少1摩尔的甲醛(可以从释放甲醛的物质中原位形成)和卤代试剂在-10℃至+150℃的温度下反应,选择性地在稀释剂和作为催化剂的质子释放化合物(例如氢卤酸)或路易斯酸的存在下制备。