참여 물질
| 역할 | 이름 | HCID | 투입량 |
|---|
| 반응물 | Potassium Carbonate | HCID 11430 | — |
| 반응물 | 1,4-Dioxane | HCID 31275 | — |
| 반응물 | Methyl 3-bromo-5-phenyl-thiophene-2-carboxylate | HCID 20775762 | — |
| 반응물 | HCID 66683955 | HCID 66683955 | — |
| 촉매 | Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI) | HCID 24350 | — |
| 용매 | Ethyl Acetate | HCID 8857 | — |
| 생성물 | HCID 66685270 | HCID 66685270 | 29.4% |
반응 단계
A tube was charged with trans-cyclohexanediamine (162 mg, 1.42 mmol, 0.5 equiv), K2CO3 (783 mg, 5.67 mmol, 2.0 equiv), 3-bromo-5-phenyl-thiophene-2-carboxylic acid methyl ester (1.01 g, 3.40 mmol, 1.2 equiv), CuI (270 mg, 1.42 mmol, 0.5 equiv), (R)-3-Cyclohexyl-5-oxo-piperazine-1-carboxylic acid tert-butyl ester (800 mg, 2.83 mmol, 1.0 equiv) and 1,4-dioxane (3.0 mL). The tube was then flushed with N2 and sealed. The reaction mixtures were heated at 110° C. for 72 hours after which it was diluted with EtOAc and filtered. The filtrate was washed with 1.0 N HCl aq. solution, brine, dried (Na2SO4) and concentrated. The residue was purified by silica gel column chromatography (EtOAc/heptane, 50%) to give product (R)-3-Cyclohexyl-4-(2-methoxycarbonyl-5-phenyl-thiophen-3-yl)-5-oxo-piperazine-1-carboxylic acid tert-butyl ester 415 mg.
출처 및 근거
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|
| 특허 번호 | US09040690B2 |
|---|
| 출처 데이터셋 | uspto-grants-2015_05 |
|---|
| ORD ID | ord-957f1efe45d64f02bdc55d90d5c9c129 |
|---|
| 출처 메모 | uspto-grants-2015_05 |
|---|
