30561-27-4

Upstream product

• 78158-82-4 6-{N'-[1-(4-Bromo-phenyl)-meth-(Z)-ylidene]-hydrazino}-1,3-dimethyl-5-phenylazo-1H-pyrimidine-2,4-dione 
• 65627-02-3 4-bromo-benzaldehyde (1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydro-pyrimidin-4-yl)-hydrazone 
• 78158-87-9 6-{N'-[1-(4-Bromo-phenyl)-meth-(Z)-ylidene]-hydrazino}-1,3-dimethyl-5-(4-nitro-phenylazo)-1H-pyrimidine-2,4-dione 
• 65358-02-3 6-{N'-[1-(4-Bromo-phenyl)-meth-(E)-ylidene]-N-methyl-hydrazino}-1,3-dimethyl-1H-pyrimidine-2,4-dione 

Relevant academic research and scientific papers

N-Bromosuccinimide in Heterocyclic Synthesis. Synthesis of Pyrazolopyrimidines, Pyrimido-as-triazines, and Pyrimidopyridazines from 6-Arylidenehydrazino-1,3-dimethyluracil Derivatives

Reactions of 6-arylidenehydrazino-1,3-dimethyluracil derivatives with N-bromosuccinimide leading to pyrazolopyrimidines, pyrimido-as-triazines, and pyrimidopyridazines are described.

A NEW SYNTHESIS OF PYRIMIDO-as-TRIAZINE DERIVATIVES

The reaction of 5-arylazo-6-arylidenehydrazino-1,3-dimethyluracils (II), prepared by the diazotization of 6-arylidenehydrazino-1,3-dimethyluracils (I), with dimethylformamide dimethylacetal afforded the corresponding 3-arylfervenulins (3-aryl-6,8-dimethylpyrimido-as-triazine-5,7(6H,8H)-diones) (V).