Trityl chloride → S-Trityl-L-Cysteine

HRID 1171632ノート

反応式

HRID 1171632 の反応式
Cl.[NH2:2][C@H:3]([C:6]([OH:8])=[O:7])[CH2:4][SH:5].[C:9](Cl)([C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1)([C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)[C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1.C([O-])(=O)C.[Na+]>CN(C=O)C>[C:9]([S:5][CH2:4][C@@H:3]([C:6]([OH:8])=[O:7])[NH2:2])([C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1)([C:22]1[CH:23]=[CH:24][CH:25]=[CH:26][CH:27]=1)[C:16]1[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=1

参加物

5

反応物 3

HCID 6456Trityl chlorideHCID 60960Cysteine HydrochlorideHCID 517045Sodium Acetate

生成物 1

HCID 76044S-Trityl-L-Cysteine収率 89%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

反応条件

温度
50 °C

実験手順

L-Cysteine hydrochloride (100 g, 0.634 mol) and trityl chloride (270 g, 0.969 mol) were stirred in DMF (400 mL) for 2 days at room temperature. A 10% sodium acetate solution (3.5 L) was then added dropwise and the white precipitate which formed was filtered and washed with distilled water. Afterward, the residue was stirred in acetone at 50° C. for 30 min after which it was cooled to 0° C. and filtered. The precipitate was washed with a little acetone and diethyl ether and dried in vacuo. S-Trityl-L-cysteine 1b (205 g, 89%) was obtained as a white powder. 1b: m.p. 192° C. (decomp). 1H NMR (DMSO-d6) δ 2.45 (dd, 1H, J=9 Hz, 12 Hz), 2.58 (dd, 1H, J=4.4 Hz, 12 Hz), 2.91 (m, 1H), 7.22-7.36 (m, 15H); 13C NMR (75.5 MHz, DMSO-d6): δ 33.8, 53.7, 66.4, 127.1, 127.8, 128.1, 128.4, 129.5, 144.5, 168.4. This material was directly used in the next step without further purification.

後処理

  1. customthe white precipitate which formed
  2. filtrationwas filtered
  3. washwashed with distilled water
  4. temperaturewas cooled to 0° C.
  5. filtrationfiltered
  6. washThe precipitate was washed with a little acetone and diethyl ether
  7. customdried in vacuo

出典と根拠

ORDレコード
ord-3a9ac38fbca445dba506d7f223f90259
出典データセット
uspto-grants-2010_11
特許番号
US07829709B1

反応ノート

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