The invention is directed to method for the preparation of pyrrolines of the general formula (I) by catalytic hydration of a nitroketone of the general formula (II) employing a transition metal catalyst and gaseous hydrogen at an elevated pressure in a solvent, optionally in the presence of at least one additive selected among Lewis acids, Brønstedt acids, organic sulfur-containing compounds, organic or inorganic bases, and water scavengers, wherein in formulae (I) and (II) B1, B2, B3, B4, X, R, and T are as defined in the specification, and to a nitroketone of formula (II) to be used as intermediate in the process according to the invention and as pesticidal agent.
该发明涉及一种通过在溶剂中使用过渡
金属催化剂和气态氢在高压下对通式(II)的硝基酮进行催化
水合制备通式(I)的
吡咯烯的方法,可选地,在Lewis酸、Brønstedt酸、有机
含硫化合物、有机或
无机碱和
水清除剂中选择至少一种添加剂的存在下进行,其中在通式(I)和(II)中,B1、B2、B3、B4、X、R和T如规范中定义,并且涉及用作本发明过程中间体和
杀虫剂剂的通式(II)的硝基酮。