Trimethylsilyl isocyanate → 1-(4-Methoxyphenyl)-4-[2-(5-aminocarbonylisochroman-1-yl)ethyl]piperazine

HRID 1417835

反応式

HRID 1417835 の反応式
C([Li])(C)(C)C.[CH3:6][O:7][C:8]1[CH:13]=[CH:12][C:11]([N:14]2[CH2:19][CH2:18][N:17]([CH2:20][CH2:21][CH:22]3[C:31]4[C:26](=[C:27](Br)[CH:28]=[CH:29][CH:30]=4)[CH2:25][CH2:24][O:23]3)[CH2:16][CH2:15]2)=[CH:10][CH:9]=1.C[Si]([N:37]=[C:38]=[O:39])(C)C>C1COCC1.O1CCOCC1>[CH3:6][O:7][C:8]1[CH:13]=[CH:12][C:11]([N:14]2[CH2:19][CH2:18][N:17]([CH2:20][CH2:21][CH:22]3[C:31]4[C:26](=[C:27]([C:38]([NH2:37])=[O:39])[CH:28]=[CH:29][CH:30]=4)[CH2:25][CH2:24][O:23]3)[CH2:16][CH2:15]2)=[CH:10][CH:9]=1

参加物

6

反応物 3

HCID 70696Trimethylsilyl isocyanateHCID 232887441-(4-Methoxyphenyl)-4-[2-(5-bromoisochroman-1-yl)ethyl]piperazineHCID 178418306HCID 178418306、化合物

生成物 1

HCID 232888291-(4-Methoxyphenyl)-4-[2-(5-aminocarbonylisochroman-1-yl)ethyl]piperazine

試薬・触媒・溶媒 2

HCID 8028Tetrahydrofuran溶媒2 回HCID 312751,4-Dioxane溶媒

実験手順

A mixture of t-butyl lithium (2 eqs, 1.7M in hexane) in THF (2 ml/mmol bromide) is cooled to -78° for 10 minutes before adding the 1-(4-methoxyphenyl)-4-[2-(5-bromoisochroman-1-yl)ethyl]piperazine (LXXIV, EXAMPLE 100) in THF (4 ml/mmol) dropwise over 10 minutes. A freshly distilled solution of trimethylsilylisocyanate (1.5 eqs) is added via syringe as a solution in dioxane (4 volume equivalents) at once. After 15 minutes, the cooling bath is removed and the mixture allowed to warm to 20°-25°. The reaction mixture is quenched with ammonium chloride, the organics are removed under reduced pressure, and the aqueous residue is extracted two times with methylene chloride, dried over sodium sulfate, filtered and concentrated. The crude material is purified by flash chromatography on silica gel. In this manner, 1-(4-methoxyphenyl)-4-[2-(5-bromoisochroman-1-yl)ethyl]piperazine (LXXIV, EXAMPLE 100, 345 mg) is converted to the corresponding amide, the title compound, mp 185°-186°.

後処理

  1. temperatureis cooled to -78° for 10 minutes
  2. customthe cooling bath is removed
  3. temperatureto warm to 20°-25°
  4. customThe reaction mixture is quenched with ammonium chloride
  5. customthe organics are removed under reduced pressure
  6. extractionthe aqueous residue is extracted two times with methylene chloride
  7. dry with materialdried over sodium sulfate
  8. filtrationfiltered
  9. concentrationconcentrated
  10. customThe crude material is purified by flash chromatography on silica gel

出典と根拠

ORDレコード
ord-d878029febda4befa871bebf18ae3d89
出典データセット
uspto-grants-1999_03
特許番号
US05877317

関連ノート

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