Sodium hydride → 1-Triphenylmethyl-1,4,5,6-tetrahydro-5-(3-methyl-1,2,4-oxadiazol-5-yl)pyrimidine

HRID 1653711ノート

反応式

HRID 1653711 の反応式
[H-].[Na+].[C:3](=[N:6][OH:7])([NH2:5])[CH3:4].[C:8]1([C:14]([C:31]2[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=2)([C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)[N:15]2[CH2:20][CH:19]([C:21](OC)=O)[CH2:18][N:17]=[CH:16]2)[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1>C1COCC1>[C:31]1([C:14]([C:8]2[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=2)([C:25]2[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=2)[N:15]2[CH2:20][CH:19]([C:21]3[O:7][N:6]=[C:3]([CH3:4])[N:5]=3)[CH2:18][N:17]=[CH:16]2)[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1

参加物

5

反応物 3

HCID 24758Sodium hydrideHCID 30926N-HydroxyacetamidineHCID 100455711-Triphenylmethyl-5-methoxycarbonyl-1,4,5,6-tetrahydropyrimidine

生成物 1

HCID 100244281-Triphenylmethyl-1,4,5,6-tetrahydro-5-(3-methyl-1,2,4-oxadiazol-5-yl)pyrimidine

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

反応条件

温度
0 °C

実験手順

Sodium hydride (60% dispersion in mineral oil 26 mg, 0.65 mmol) and acetamidoxime (48 mg, 0.65 mmol) were suspended in dry THF (4 ml) in an oven dried round bottom flask with stirring under nitrogen at 0° C. After 15 minutes stirring the ice bath was removed and the grey suspension refluxed 45 minutes to give a white suspension. 1-Triphenylmethyl-1,4,5,6-tetrahydro-5-methoxycarbonylpyrimidine (250 mg, 0.65 mmol) was added dissolved in dry THF (3 ml) and reflux continued 18 hours. The solvents were evaporated in vacuo and the residue taken up in water (10 ml). The aqueous suspension was extracted exhaustively with chloroform and the organics dried over MgSO4. After evaporation the organic residue was chromatographed (silica, chloroform/methanol, 9:1) to yield 93 mg (rf=0.26, 35%) white crystals, mp 72°-74° C. identified by 300 MHz nmr and ms m/z=408. Calculated: C 76.44, H 5.9, N 13.7; found: C 76.27, H 6.06, N 13.59.

後処理

  1. customdried round bottom flask
  2. stirringAfter 15 minutes stirring the ice bath
  3. customwas removed
  4. temperaturethe grey suspension refluxed 45 minutes
  5. customto give a white suspension
  6. temperaturereflux
  7. customThe solvents were evaporated in vacuo
  8. extractionThe aqueous suspension was extracted exhaustively with chloroform
  9. dry with materialthe organics dried over MgSO4
  10. customAfter evaporation the organic residue
  11. customwas chromatographed (silica, chloroform/methanol, 9:1)
  12. customto yield 93 mg (rf=0.26, 35%) white crystals, mp 72°-74° C.

出典と根拠

ORDレコード
ord-baa858b8cc324c37b17b226965164d41
出典データセット
uspto-grants-1995_04
特許番号
US05403845

反応ノート

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