Hydrochloric Acid → (R)-[1-(2-hydroxy-ethyl)-4,5,6,7-tetrahydro-1H-indazol-4-yl]-carbamic acid benzyl ester

HRID 1645145노트

반응식

HRID 1645145 반응식
C([O:3][C:4](=O)[CH2:5][N:6]1[C:14]2[CH2:13][CH2:12][CH2:11][C@@H:10]([NH:15][C:16]([O:18][CH2:19][C:20]3[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=3)=[O:17])[C:9]=2[CH:8]=[N:7]1)C.[BH4-].[Na+].Cl>CO>[CH2:19]([O:18][C:16](=[O:17])[NH:15][C@@H:10]1[CH2:11][CH2:12][CH2:13][C:14]2[N:6]([CH2:5][CH2:4][OH:3])[N:7]=[CH:8][C:9]1=2)[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1

참가 물질

5

반응물 3

HCID 313Hydrochloric AcidHCID 4311764Sodium borohydrideHCID 59152896((R)-4-benzyloxycarbonylamino-4,5,6,7-tetrahydro-indazol-1-yl)-acetic acid ethyl ester

생성물 1

HCID 59152899(R)-[1-(2-hydroxy-ethyl)-4,5,6,7-tetrahydro-1H-indazol-4-yl]-carbamic acid benzyl ester수율 95.1%

시약·촉매·용매 1

HCID 887Methanol용매

반응 조건

온도
70 °C

실험 절차

To a solution of ((R)-4-benzyloxycarbonylamino-4,5,6,7-tetrahydro-indazol-1-yl)-acetic acid ethyl ester (2.00 g, 5.60 mmol) in methanol (150 mL) was added sodium borohydride (1.61 g, 39.5 mmol). The mixture was stirred at 70° C. for 2 hours. After being cooled to room temperature, the reaction mixture was acidified to pH 7 with 5N hydrochloric acid, and then concentrated to remove methanol. The resulting mixture was extracted with dichloromethane (20 mL). After filtering out any insoluble materials from the organic layer, the filtrate was concentrated in vacuo to give (R)-[1-(2-hydroxy-ethyl)-4,5,6,7-tetrahydro-1H-indazol-4-yl]-carbamic acid benzyl ester (1.68 g, 95%) as a white solid. MS calcd. for C17H21N3O3 315, obsd. (ESI+) [(M+H)+] 316.

후처리

  1. temperatureAfter being cooled to room temperature
  2. concentrationconcentrated
  3. customto remove methanol
  4. extractionThe resulting mixture was extracted with dichloromethane (20 mL)
  5. filtrationAfter filtering out any insoluble materials from the organic layer
  6. concentrationthe filtrate was concentrated in vacuo

출처 및 근거

ORD 기록
ord-49e3d268525147238189e3438f4046db
출처 데이터셋
uspto-grants-2012_02
특허 번호
US08124641B2

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