Tetrahydrofuran → HCID 12020043, compound

HRID 2268298Notes

Reaction equation

HRID 2268298 reaction equation
[Si:1]([O:8][C@@H:9]1[C@@:37]2([CH3:38])[C:13](=[CH:14][CH:15]=[C:16]3[C@@H:36]2[CH2:35][CH2:34][C@@:33]2([CH3:39])[C@H:17]3[CH2:18][CH:19]=[C:20]2[C@@H:21]([S:23]C(OC2C=CC=CC=2)=O)[CH3:22])[CH2:12][C@@H:11]([OH:40])[CH2:10]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].Br[CH2:42]/[CH:43]=[CH:44]/[C:45]([CH3:48])([OH:47])[CH3:46].O1CCCC1.[OH-].[K+]>CO>[Si:1]([O:8][C@@H:9]1[C@@:37]2([CH3:38])[C:13](=[CH:14][CH:15]=[C:16]3[C@@H:36]2[CH2:35][CH2:34][C@@:33]2([CH3:39])[C@H:17]3[CH2:18][CH:19]=[C:20]2[C@@H:21]([S:23][CH2:42]/[CH:43]=[CH:44]/[C:45]([OH:47])([CH3:48])[CH3:46])[CH3:22])[CH2:12][C@@H:11]([OH:40])[CH2:10]1)([C:4]([CH3:6])([CH3:7])[CH3:5])([CH3:3])[CH3:2]

Participants

6

Reactant 4

HCID 8028TetrahydrofuranHCID 14797Potassium HydroxideHCID 12019512HCID 12019512, compoundHCID 22027668HCID 22027668, compound

Product 1

HCID 12020043HCID 12020043, compoundYield 81.2%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

Under the same conditions as in Example 3, 1α-(tert-butyldimethylsilyloxy)-3β-hydroxy-20(S)-phenoxycarbonylthiopregna-5,7,16-triene (33.5 mg, 0.0577 mmol), (E)-5-bromo-2-methyl-3-penten-2-ol (41.2 mg, 0.230 mmol), tetrahydrofuran (0.5 ml) and 1M KOH solution in methanol (0.5 ml) were reacted and worked up, and then the residue was purified by preparative thin layer chromatography (0.5 mm×1, dichloromethane:ethyl acetate=5:1, developed twice) to give 26.2 mg of a product, which was directly used in the subsequent reaction because it was difficult to separate from (E)-5-bromo-2-methyl-3-penten-2-ol.

Workup

  1. customthe residue was purified by preparative thin layer chromatography (0.5 mm×1, dichloromethane

Sources & evidence

ORD record
ord-b5a70b6b8cab4c8c99764923874f796b
Source dataset
uspto-grants-2001_12
Patent number
US06326503B1

Reaction notes

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