Cyanoacetic acid → 6-Amino-1,3-bis(cyclohexylmethyl)uracil

HRID 276796노트

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HRID 276796 반응식
[C:1]([CH2:3][C:4](O)=[O:5])#[N:2].[CH:7]1([CH2:13][NH:14][C:15]([NH:17][CH2:18][CH:19]2[CH2:24][CH2:23][CH2:22][CH2:21][CH2:20]2)=[O:16])[CH2:12][CH2:11][CH2:10][CH2:9][CH2:8]1>C(OC(=O)C)(=O)C>[NH2:2][C:1]1[N:14]([CH2:13][CH:7]2[CH2:8][CH2:9][CH2:10][CH2:11][CH2:12]2)[C:15](=[O:16])[N:17]([CH2:18][CH:19]2[CH2:24][CH2:23][CH2:22][CH2:21][CH2:20]2)[C:4](=[O:5])[CH:3]=1

참가 물질

4

반응물 2

HCID 9740Cyanoacetic acidHCID 2315151,3-Bis(cyclohexylmethyl)urea

생성물 1

HCID 222449716-Amino-1,3-bis(cyclohexylmethyl)uracil수율 94.2%

시약·촉매·용매 1

HCID 7918Acetic Anhydride용매

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온도
80 °C

실험 절차

Cyanoacetic acid (Aldrich, 21.0 g) was dissolved in acetic anhydride (260 ml). This solution was added to 1,3-bis(cyclohexylmethyl)urea (from step (a), 54.5 g) and the solution maintained at 80° C. for 2 h under nitrogen. Volatiles were removed in vacuo and the residual oil dried by evaporation of portions of 10% water-ethanol (3×400 ml). The residual solids were dissolved in ethanol (600 ml)-water(300 ml) at 80° C. with adjustment of the pH to 10 by addition of 10% aqueous sodium carbonate. The hot solution was diluted with water (75 ml) and cooled to ambient temperature. The colorless crystals which formed were filtered off, washed with water (3×500 ml) and dried at 67 Pa (0.5 Torr) to give 6-amino-1,3-bis(cyclohexylmethyl)uracil (64.98 g, 94%), m.p. 138-141° C.; 1H-NMR (DMSO-d6) δ: 6.73 (br s, 2, NH2), 4.63 (s, 1, H-5), 3.67 (d, J=7.3 Hz, 2, NCH2), 3.57 (d, J=7.3 Hz, 2, NCH2), 1.55 and 1.09 (both m, 22, 2 cyclohexyl).

후처리

  1. customVolatiles were removed in vacuo
  2. dry with materialthe residual oil dried by evaporation of portions of 10% water-ethanol (3×400 ml)
  3. dissolutionThe residual solids were dissolved in ethanol (600 ml)-water(300 ml) at 80° C. with adjustment of the pH to 10
  4. additionby addition of 10% aqueous sodium carbonate
  5. additionThe hot solution was diluted with water (75 ml)
  6. temperaturecooled to ambient temperature
  7. customThe colorless crystals which formed
  8. filtrationwere filtered off
  9. washwashed with water (3×500 ml)
  10. customdried at 67 Pa (0.5 Torr)

출처 및 근거

ORD 기록
ord-3fbc3f32a2644b26912d4356ea35f78c
출처 데이터셋
uspto-grants-2002_03
특허 번호
US06355646B1

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