A (preferably nonaqueous) method of making a dipyrromethane is described. The comprises the steps of: (a) providing a reaction system consisting essentially of an aldehyde or acetal, excess pyrrole and a catalyst; (b) reacting the aldehyde or acetal with the pyrrole in the reaction system to form the dipyrromethane therein; (c) quenching the reaction system by adding a base thereto (preferably without simultaneously or concurrently adding water and/or an organic solvent thereto); (d) separating the catalyst from the reaction system; and then (e) separating the pyrrole from the reaction system to produce the dipyrromethane as a residual
描述了一种制备二
吡咯甲烷的(最好是非
水性)方法。该方法包括以下步骤:(a)提供基本上由醛或
缩醛、过量
吡咯和催化剂组成的反应体系;(b)在反应体系中将醛或
缩醛与
吡咯反应,形成其中的二
吡咯甲烷;(c)通过向反应体系中加入碱来淬灭反应体系(最好不同时或同时向其中加入
水和/或有机溶剂);(d)将催化剂从反应体系中分离;然后(e)将
吡咯从反应体系中分离,以产生二
吡咯甲烷作为残留物。