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Tetrabutylammonium Fluoride → 1alpha,3beta-dihydroxy-20(R)-{(Z)-(4-ethyl-4-hydroxy-2-hexenyloxy)}pregna-5,7,16-triene

HRID 2268335
Notes
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Reaction equation

HRID 2268335 reaction equation
[Si]([O:8][C@@H:9]1[C@@:44]2([CH3:45])[C:13](=[CH:14][CH:15]=[C:16]3[C@@H:43]2[CH2:42][CH2:41][C@@:40]2([CH3:46])[C@H:17]3[CH2:18][CH:19]=[C:20]2[C@H:21]([O:23][CH2:24]/[CH:25]=[CH:26]\[C:27]([CH2:38][CH3:39])([O:30][Si](CC)(CC)CC)[CH2:28][CH3:29])[CH3:22])[CH2:12][C@@H:11]([O:47][Si](C(C)(C)C)(C)C)[CH2:10]1)(C(C)(C)C)(C)C.[F-].C([N+](CCCC)(CCCC)CCCC)CCC>O1CCCC1>[OH:8][C@@H:9]1[C@@:44]2([CH3:45])[C:13](=[CH:14][CH:15]=[C:16]3[C@@H:43]2[CH2:42][CH2:41][C@@:40]2([CH3:46])[C@H:17]3[CH2:18][CH:19]=[C:20]2[C@H:21]([O:23][CH2:24]/[CH:25]=[CH:26]\[C:27]([CH2:38][CH3:39])([OH:30])[CH2:28][CH3:29])[CH3:22])[CH2:12][C@@H:11]([OH:47])[CH2:10]1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

4

Reactant 2

HCID 2724141Tetrabutylammonium FluorideHCID 700083741alpha,3beta-bis(tert-butyldimethylsilyloxy)-20(R)-{(Z)-(4-ethyl-4-triethylsilyloxy-2-hexenyloxy)}pregna-5,7,16-triene

Product 1

HCID 700083821alpha,3beta-dihydroxy-20(R)-{(Z)-(4-ethyl-4-hydroxy-2-hexenyloxy)}pregna-5,7,16-trieneYield 98%

Reagents, catalysts & solvents 1

HCID 8028Tetrahydrofuran
Solvent
2×

Procedure

By the same procedure as in Example 9, 1α,3β-bis(tert-butyldimethylsilyloxy)-20(R)-{(Z)-(4-ethyl-4-triethylsilyloxy-2-hexenyloxy)}pregna-5,7,16-triene (82.0 mg, 0.103 mmol), tetrahydrofuran (3 ml) and 1M tetra-n-butylammonium fluoride solution in tetrahydrofuran (2 ml) were reacted (heating under reflux for 5.5 hours) and worked up, and then the residue was purified by preparative thin layer chromatography (0.5 mm×1, dichloromethane:ethyl acetate:ethanol=20:80:1, developed once) to give the title compound as a white solid (46.1 mg, 98%).

Workup

  1. temperature(heating under reflux for 5.5 hours)
  2. customthe residue was purified by preparative thin layer chromatography (0.5 mm×1, dichloromethane

Sources & evidence

ORD record
ord-82d59e85ed9e4156b9115046697b1fa5
Source dataset
uspto-grants-2001_12
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US06326503B1

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes