- Jun 05, 2018 -

There are two main routes for the synthesis of bispyribac-sodium. One is the non-esterification law. Second, ester base on the protection, from 2, 6 - dihydroxy benzoic acid esterification first, and then esterification and 2 - to replace - 4, 6 - dimethoxy pyrimidine in alkaline ether ester, under the condition of reaction with grass by catalytic hydrogenation, and get double grass ethers. The key intermediates are 2-substituted -4, 6-dimethoxy pyrimidine, usually 4-6-dimethoxy -2-methoxy pyrimidine.

Bispyribac-sodium has the following structure:


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