Iodoethane → 3-Ethylindol-2-one

HRID 6985

反応式

HRID 6985 の反応式
[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH2:3][C:2]1=[O:10].[CH2:11]([Li])[CH2:12]CC.CN(C)CCN(C)C.ICC.[NH4+].[Cl-]>C1COCC1>[CH2:11]([C:3]1[C:2](=[O:10])[N:1]=[C:9]2[C:4]=1[CH:5]=[CH:6][CH:7]=[CH:8]2)[CH3:12]

参加物

7

反応物 5

HCID 6340IodoethaneHCID 8037N,N,N',N'-TetramethylethylenediamineHCID 25517Ammonium ChlorideHCID 321710OxindoleHCID 178418339Butyllithium

生成物 1

HCID 219862793-Ethylindol-2-one収率 2.9%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

実験手順

A solution of oxindole (40 g, 0.3 mol) in dry THF (400 ml) under N2 was cooled to −25° C. and treated drop wise with n-butyl lithium (2.5M in hexanes, 240 ml, 0.6 mol). To the resulting solution was added N,N,N′,N′-tetramethylethylenediamine (90.4 ml, 0.6 mol). After 30 min. iodoethane (48 ml, 0.6 mol) was added and the reaction mixture was allowed to warm to RT and stirred over night. The reaction mixture was poured into aqueous NH4Cl solution, extracted with EtOAc (2×) and the combined organic layers were washed with dil. HCl, water, brine, dried (MgSO4) and concentrated. The residual oil was triturated with hexane to afford the crude product (24.5 g, 51%). A sample (3 g) was recrystallized from EtOAc/hexane to obtain the title compound (1.4 g), m.p. 100–101° C.; 1H-NMR (DMSO-d6) δ 0.76 (t, 3H, J=7.5 Hz), 1.8–2.0 (m, 2H), 3.38 (t, 3H, J=5.7 Hz), 6.8 (dt, 1H, J=7.69, 0.45 Hz), 6.93 (dt, 1H, J=7.45, 1.10 Hz), 7.15 (m, 1H), 7.22 (m, 1H), 10.3 (s, 1H); MS (ESI) m/z 270 [M+H].

後処理

  1. extractionextracted with EtOAc (2×)
  2. washthe combined organic layers were washed with dil. HCl, water, brine
  3. dry with materialdried (MgSO4)
  4. concentrationconcentrated
  5. customThe residual oil was triturated with hexane
  6. customto afford the crude product (24.5 g, 51%)
  7. customA sample (3 g) was recrystallized from EtOAc/hexane

出典と根拠

ORDレコード
ord-1ed7f37270af420fb0e5d51ef1f37326
出典データセット
uspto-grants-2006_08
特許番号
US07084168B2

関連ノート

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