Method of preparing 3-substituted pyridopyrimidinediones and lumazines
Abstract
Abstract A METHOD OF PREPARING 3-SUBSITUTED-PYRIDO(2,3-D)PYRIMIDINE-2,4-1H,3H)-DIONES, 3-SUBSITUTED-PYRIDO-(3,2-D) PYRIMIDINE - 2,4(1H,3H) -DIONES, 3 - SUBSITUTED-PYRIDO (3,4-D)PYRIMIDINE - 2,4(1H,3H) - DIONES, 3 - SUBSTITUTED PYRIDO (4,3-D)PYRIMIDINE-2,4(1H,3H)-DIONES, AND 3-SUBSTITUTED LUMAZINES FROM THE CORRESPONDING N-MONOSUBSTITUTED 2,3- AND 3,4-PYRIDINEDICARBOXAMIDES, AND 2,3-PYRAZINEDICARBOXAMIDES, IN WHICH THE AFORESAID COMPOUNDS ARE REACTED WITH AN ALKALI OR ALKALINE EARTH METAL HYPOHALITE IN THE PRESENCE OF A BASE, PREFERABLY AQOUEOUS SODIUM HYDROXIE. MANY OF THE PYRIDOPYRIMIDINEDIONES AND LUMAZINES THUS FORMED ARE USEFUL AS AGRICULTURAL CHEMICALS, IN PATRICULAR AS HERBICIDES, AND THE OTHERS ARE PECULIARLY USEFUL, BECAUSE OF THEIR CLOSE CHEMICAL SIMILARITY BUT DRASTICALLY DIFFERENT HERBICIDAL ACTIVITY, IN INVESTIGATORY RESEARCH AS TO THE RELATIONSHIP BETWEEN CHEMICAL STRUCTURE AND HERBICIDAL STRUCTURE.
Inventors
- 👤 Richard L Jacobs
Bibliographic Details
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