Triphenylphosphine → (R)-4-(benzothiazol-2-ylsulfanyl-methyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester

HRID 1026127

反応式

HRID 1026127 の反応式
[C:1]([O:5][C:6]([N:8]1[C@@H:12]([CH2:13]O)[CH2:11][O:10][C:9]1([CH3:16])[CH3:15])=[O:7])([CH3:4])([CH3:3])[CH3:2].[SH:17][C:18]1[S:19][C:20]2[CH:26]=[CH:25][CH:24]=[CH:23][C:21]=2[N:22]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>C1COCC1.CCOC(C)=O>[C:1]([O:5][C:6]([N:8]1[C@@H:12]([CH2:13][S:17][C:18]2[S:19][C:20]3[CH:26]=[CH:25][CH:24]=[CH:23][C:21]=3[N:22]=2)[CH2:11][O:10][C:9]1([CH3:16])[CH3:15])=[O:7])([CH3:4])([CH3:3])[CH3:2]

参加物

7

反応物 4

HCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 11053463(S)-4-Hydroxymethyl-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl esterHCID 178418395HCID 178418395、化合物

生成物 1

HCID 67178031(R)-4-(benzothiazol-2-ylsulfanyl-methyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester収率 93.9%

試薬・触媒・溶媒 2

HCID 8028Tetrahydrofuran溶媒HCID 8857Ethyl Acetate溶媒

実験手順

To a stirred, cooled (0° C.) solution of (S)-4-hydroxymethyl-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester (1.36 g), 2-mercaptobenzothiazole (1.48 g) and triphenylphosphine (2.32 g) in THF (80 ml) under an argon atmosphere was added diethyl azodicarboxylate (4.1 ml; 40% solution in toluene). The mixture (soon turning to a yellow suspension, slowly warming up to r.t.) was stirred for 18 h overnight, then diluted with EtOAc and washed with sat. aq. Na2CO3. The aqueous phase was back extracted with EtOAc. The combined organics were washed with brine, dried over MgSO4, filtered and concentrated. The crude product was purified by column chromatography (SiO2; gradient: cyclohexane ->cyclohexane/EtOAc 85:15) to give (R)-4-(benzothiazol-2-ylsulfanyl-methyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester (2.1 g) as light yellow viscous oil.

後処理

  1. washwashed with sat. aq. Na2CO3
  2. extractionThe aqueous phase was back extracted with EtOAc
  3. washThe combined organics were washed with brine
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe crude product was purified by column chromatography (SiO2; gradient: cyclohexane ->cyclohexane/EtOAc 85:15)

出典と根拠

ORDレコード
ord-829b2dd6db504d329e5c6f1d754be4c9
出典データセット
uspto-grants-2014_05
特許番号
US08729113B2

関連ノート

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