Trifluoroacetic acid → (2S,4S)-4-(9H-fluoren-9-ylmethoxycarbonylamino)-pyrrolidine-2-carboxylic acid benzyl ester

HRID 1527374ノート

反応式

HRID 1527374 の反応式
C(OC([N:8]1[CH2:12][C@@H:11]([NH:13][C:14]([O:16][CH2:17][CH:18]2[C:30]3[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=3[C:24]3[C:19]2=[CH:20][CH:21]=[CH:22][CH:23]=3)=[O:15])[CH2:10][C@H:9]1[C:31]([O:33][CH2:34][C:35]1[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=1)=[O:32])=O)(C)(C)C.C(O)(C(F)(F)F)=O>C(Cl)Cl>[CH2:34]([O:33][C:31]([C@@H:9]1[CH2:10][C@H:11]([NH:13][C:14]([O:16][CH2:17][CH:18]2[C:30]3[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=3[C:24]3[C:19]2=[CH:20][CH:21]=[CH:22][CH:23]=3)=[O:15])[CH2:12][NH:8]1)=[O:32])[C:35]1[CH:36]=[CH:37][CH:38]=[CH:39][CH:40]=1

参加物

4

反応物 2

HCID 6422Trifluoroacetic acidHCID 68283347(2S,4S)-4-(9H-fluoren-9-ylmethoxycarbonylamino)-pyrrolidine-1,2-dicarboxylic acid 2-benzyl ester 1-tert-butyl ester

生成物 1

HCID 68283582(2S,4S)-4-(9H-fluoren-9-ylmethoxycarbonylamino)-pyrrolidine-2-carboxylic acid benzyl ester

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

To a solution of (2S,4S)-4-(9H-fluoren-9-ylmethoxycarbonylamino)-pyrrolidine-1,2-dicarboxylic acid 2-benzyl ester 1-tert-butyl ester (7.3 g, 13.49 mmol) in CH2Cl2 (45 mL) was added TFA (5.1 mL, 67.5 mmol). The solution was stirred at RT overnight. The solvent was concentrated and the residue co-evaporated three times with CH2Cl2 to remove the excess of TFA. The crude residue was taken-up in diethylether and the resulting precipitate filtered-off to give the title compound as a white powder. MS (LC/MS): 443.2 [MH]+; tR (HPLC conditions a): 3.3 min; 1H-NMR (400 MHz, DMSO): δ (ppm) 9.84 (s, 1H), 9.14 (s, 1H), 7.90 (d, 2H), 7.68 (d, 2H), 7.62 (d, 1H), 7.45-7.33 (m, 9H), 5.28-5.21 (m, 2H), 4.59-4.54 (m, 1H), 4.41 (d, 2H), 4.26-4.16 (m, 2H), 3.46-3.41 (m, 1H), 3.16-3.11 (m, 1H), 2.64-2.58 (m, 1H).

後処理

  1. concentrationThe solvent was concentrated
  2. customto remove the excess of TFA

出典と根拠

ORDレコード
ord-713ae00e72574733a598a1be9e86b689
出典データセット
uspto-grants-2015_07
特許番号
US09085555B2

反応ノート

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