Triethylamine → benzyl 2-[3-{[3-({2-[(tert-butoxycarbonyl)amino]ethoxy}methyl)phenethyl]amino}-5-chloro-6-methyl-2-oxo-1(2H)-pyrazinyl]acetate

HRID 2228776ノート

反応式

HRID 2228776 の反応式
[NH2:1][CH2:2][CH2:3][C:4]1[CH:5]=[C:6]([CH:19]=[CH:20][CH:21]=1)[CH2:7][O:8][CH2:9][CH2:10][NH:11][C:12](=[O:18])[O:13][C:14]([CH3:17])([CH3:16])[CH3:15].[Cl:22][C:23]1[N:28]=[C:27](Cl)[C:26](=[O:30])[N:25]([CH2:31][C:32]([O:34][CH2:35][C:36]2[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=2)=[O:33])[C:24]=1[CH3:42].C(N(CC)CC)C>C(OCC)(=O)C>[C:14]([O:13][C:12]([NH:11][CH2:10][CH2:9][O:8][CH2:7][C:6]1[CH:5]=[C:4]([CH:21]=[CH:20][CH:19]=1)[CH2:3][CH2:2][NH:1][C:27]1[C:26](=[O:30])[N:25]([CH2:31][C:32]([O:34][CH2:35][C:36]2[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=2)=[O:33])[C:24]([CH3:42])=[C:23]([Cl:22])[N:28]=1)=[O:18])([CH3:17])([CH3:15])[CH3:16]

参加物

5

反応物 3

HCID 8471TriethylamineHCID 10663926Benzyl 2-[3,5-dichloro-2-methyl-6-oxo-1(6H)-pyrazinyl]acetateHCID 18470932tert-Butyl 2-{[3-(2-aminoethyl)benzyl]oxy}ethylcarbamate

生成物 1

HCID 18470846benzyl 2-[3-{[3-({2-[(tert-butoxycarbonyl)amino]ethoxy}methyl)phenethyl]amino}-5-chloro-6-methyl-2-oxo-1(2H)-pyrazinyl]acetate収率 45.1%

試薬・触媒・溶媒 1

HCID 8857Ethyl Acetate溶媒2 回

実験手順

A mixture of tert-butyl 2-{[3-(2-aminoethyl)benzyl]oxy}ethylcarbamate (preparation 105) (270 mg, 0.92 mmol), benzyl 2-[3,5-dichloro-2-methyl-6-oxo-1(6H)-pyrazinyl]acetate (preparation 17) (300 mg, 0.92 mmol), and triethylamine (140 ml, 1.01 mmol) in ethyl acetate was heated under reflux overnight. The cooled suspension was diluted with ethyl acetate, then washed with hydrochloric acid (2N), NaHCO3 solution, brine, then dried over MgSO4 and evaporated under reduced pressure. The crude product was purified by column chromatography on silica gel using ethyl acetate:pentane (40:60) as eluant, and triturated with ether, to give the title compound as a white solid, (243 mg, 45%). Re-purifiing the ether filtrate by column chromatography on silica gel provided an additional (176 mg, 33%) of the desired product.

後処理

  1. temperaturewas heated
  2. temperatureunder reflux overnight
  3. washwashed with hydrochloric acid (2N), NaHCO3 solution, brine
  4. dry with materialdried over MgSO4
  5. customevaporated under reduced pressure
  6. customThe crude product was purified by column chromatography on silica gel
  7. customtriturated with ether

出典と根拠

ORDレコード
ord-39347fd1f2bf42a3a4492d94af73e421
出典データセット
uspto-grants-2002_07
特許番号
US06417203B1

反応ノート

読み込み中…