Huagongshe화공사 화학 정보 인쇄 보고서 · 연구 참고용
Potassium Carbonate → Ethyl 5-amino-1-isopropyl-1H-pyrazole-4-carboxylate
참여 물질
| 역할 | 이름 | HCID | 투입량 |
|---|---|---|---|
| 반응물 | Potassium Carbonate | HCID 11430 | — |
| 반응물 | 2-Propenoic acid, 2-cyano-3-ethoxy-, ethyl ester | HCID 78943 | — |
| 반응물 | 1-Isopropylhydrazine hydrochloride | HCID 85573 | — |
| 용매 | Ethanol, mixt. with methanol | HCID 18681192 | — |
| 생성물 | Ethyl 5-amino-1-isopropyl-1H-pyrazole-4-carboxylate | HCID 22762155 | 94% |
반응 단계
A mixture of ethyl 2-cyano-3-ethoxyacrylate (84.4 g, 0.50 mol), isopropyl hydrazine hydrochloride (55.2 g, 0.50 mol) and potassium carbonate (68.8 g, 0.50 mol) in 90% ethanol/methanol (1.5 L) was heated under reflux for 16 hours. The solvent was then removed in vacuo and water and ethyl acetate were added. The mixture was separated and the organic layer was dried over magnesium sulfate, filtered and the solvent was removed in vacuo to yield ethyl 5-amino-1-isopropyl-1H-pyrazole-4-carboxylate (92.4 g, 94%). +ESI (M+H) 198.1; 1H NMR (400 MHz, CDCl3, δ): 7.63 (s, 1H), 4.97 (br. s., 2H), 4.28 (q, 2H), 4.18 (m, 1H), 1.45 (d, 6H), 1.31 (t, 3H).
출처 및 근거
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| 특허 번호 | US08859773B2 |
| 출처 데이터셋 | uspto-grants-2014_10 |
| ORD ID | ord-899d5432338e466ca41209097754de76 |
| 출처 메모 | uspto-grants-2014_10 |