Radl, Stanislav; Blahovcova, Michaela; Tkadlecova, Marcela; Havlicek, Jaroslav published the article 《Synthetic studies connected with the preparation of N-[3-(3-cyanopyrazolo[1,5-a]pyrimidin-5-yl)phenyl]-N-ethylacetamide, a zaleplon regioisomer》. Keywords: chloropyrazolopyrimidincarbonitrile boronate Suzuki Miyaura coupling; zaleplon regioisomer preparation.They researched the compound: Ethyl 3-Ethoxy-2-Propenoate( cas:1001-26-9 ).Related Products of 1001-26-9. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:1001-26-9) here.
N-[3-(3-Cyanopyrazolo[1,5-a]pyrimidin-5-yl)phenyl]-N-ethylacetamide, a principal impurity of zaleplon, was prepared by Suzuki-Miyaura cross-coupling of appropriate boronates with 5-chloropyrazolo[1,5-a]pyrimidin-3-carbonitrile. Various methods of preparation of both components were described, as well as approaches based on the final modification of the 5-(3-aminophenyl)pyrazolo[1,5-a]pyrimidine-3-carbonitrile moiety prepared by Suzuki-Miyaura cross-coupling. All the prepared compounds were unambiguously identified by NMR. IR, UV, and mass spectra of these compounds were also given.
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Reference:
Bromide – Wikipedia,
bromide – Wiktionary