A novel process for the preparation of 2-(5,5-disubstituted-4-oxoor thiono)-2-imidazolin-2-yl)nicotinic acids, quinoline-3-carboxylic acids and benzoic acids by the base-catalyzed cyclization of appropriately substituted 2-carbamoyl nicotinic acids, 3-quinolinecarboxylic, or benzoic acids. The products are useful as herbicides.
一种新的制备方法,通过适当取代的2-
氨基甲酰基
烟酸、3-
喹啉甲酸或
苯甲酸在碱催化下环化制备2-(5,5-二取代-4-氧代或
硫代)-
2-咪唑啉-2-基)
烟酸、
喹啉-3-
甲酸和
苯甲酸。这些产品可用作
除草剂。