Sodium borohydride → 11beta-Fluoro-7alpha-{5-[2-(4,4,5,5,5-pentafluoropentylthiomethyl)pyrrolidin-1-yl]-pentyl}-estra-1,3,5(10)-triene-3,17beta-diol

HRID 650364Notes

Reaction equation

HRID 650364 reaction equation
[F:1][C@H:2]1[CH2:19][C@@:17]2([CH3:18])[C@@H:13]([CH2:14][CH2:15][C:16]2=[O:20])[C@H:12]2[C@H:3]1[C:4]1[CH:5]=[CH:6][C:7]([OH:43])=[CH:8][C:9]=1[CH2:10][C@H:11]2[CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][N:26]1[CH2:30][CH2:29][CH2:28][CH:27]1[CH2:31][S:32][CH2:33][CH2:34][CH2:35][C:36]([F:42])([F:41])[C:37]([F:40])([F:39])[F:38].[BH4-].[Na+]>O1CCCC1.C(O)C.O>[F:1][C@H:2]1[CH2:19][C@@:17]2([CH3:18])[C@@H:13]([CH2:14][CH2:15][C@@H:16]2[OH:20])[C@H:12]2[C@H:3]1[C:4]1[CH:5]=[CH:6][C:7]([OH:43])=[CH:8][C:9]=1[CH2:10][C@H:11]2[CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][N:26]1[CH2:30][CH2:29][CH2:28][CH:27]1[CH2:31][S:32][CH2:33][CH2:34][CH2:35][C:36]([F:42])([F:41])[C:37]([F:38])([F:39])[F:40]

Participants

6

Reactant 2

HCID 4311764Sodium borohydrideHCID 5725928411beta-Fluoro-3-hydroxy-7alpha-{5-[2-(4,4,5,5,5-pentafluoropentylthiomethyl)-pyrrolidin-1-yl]-pentyl}-estra-1,3,5(10)-trien-17-one

Product 1

HCID 983075611beta-Fluoro-7alpha-{5-[2-(4,4,5,5,5-pentafluoropentylthiomethyl)pyrrolidin-1-yl]-pentyl}-estra-1,3,5(10)-triene-3,17beta-diolYield 88%

Reagents, catalysts & solvents 3

HCID 702EthanolSolventHCID 962WaterSolvent2×HCID 8028TetrahydrofuranSolvent

Procedure

500 mg of 11β-fluoro-3-hydroxy-7α-{5-[2-(4,4,5,5,5-pentafluoropentylthiomethyl)-pyrrolidin-1-yl]-pentyl}-estra-1,3,5(10)-trien-17-one in 5 ml of tetrahydrofuran, 2.75 ml of ethanol and 1.1 ml of water, and 100 mg of sodium borohydride is added at a bath temperature of 0° C., and it is stirred for 0.5 hour at room temperature. Then, it is added to water, extracted 3 times with ethyl acetate, washed neutral with saturated common salt solution, dried on sodium sulfate, concentrated by evaporation in a vacuum and chromatographed on silica gel with dichloromethane/methanol. 441.3 mg of 11β-fluoro-7α-{5-[2-(4,4,5,5,5-pentafluoropentylthiomethyl)pyrrolidin-1-yl]-pentyl}-estra-1,3,5(10)-triene-3,17β-diol is obtained as crystals with a melting point of 174-176° C. [α]D22=14.9° (c=0.5% in pyridine).

Workup

  1. extractionextracted 3 times with ethyl acetate
  2. washwashed neutral with saturated common salt solution
  3. customdried on sodium sulfate
  4. concentrationconcentrated by evaporation in a vacuum
  5. customchromatographed on silica gel with dichloromethane/methanol

Sources & evidence

ORD record
ord-539edcd848c64d8fbcd143fa0b91d6c7
Source dataset
uspto-grants-2001_08
Patent number
US06271403B1

Reaction notes

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