58. The reaction of o-phenylenediamine with αβ-unsaturated acids and with β-keto-esters
✍ Scribed by Davoll, J.
- Book ID
- 120631698
- Publisher
- The Royal Society of Chemistry
- Year
- 1960
- Weight
- 646 KB
- Volume
- 0
- Category
- Article
- ISSN
- 0368-1769
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## Abstract 5-Acetyl-4,5-dihydro-1-phenylpyrazolo[3,4-d]pyrimidin-4-one was prepared and subjected to various chemical transformations to give novel 5-heterocyclic pyrazolopyrimidinone derivatives of expected important biological activity. Then, the latter compounds were used to obtain β-keto ester
## Abstract Treatment of 3‐methylamino‐5‐phenylthiophene with α,β‐unsaturated esters, __i.e.__, methyl acrylate, (__E__)‐methyl crotonate, diethyl fumarate, diethyl maleate and ethyl propiolate, in tetrahydrofuran for several days at reflux gave 1‐methyl‐3,4‐dihydrothieno[2,3‐__e__]pyridin‐2‐ones *