Tetrabutylammonium Fluoride → 1alpha,3beta-dihydroxy-20(S)-(4-hydroxy-4-methyl-2-pentynyloxy)pregna-5,7,16-triene

HRID 2268324Notes

Reaction equation

HRID 2268324 reaction equation
[Si]([O:8][C@@H:9]1[C@@:42]2([CH3:43])[C:13](=[CH:14][CH:15]=[C:16]3[C@@H:41]2[CH2:40][CH2:39][C@@:38]2([CH3:44])[C@H:17]3[CH2:18][CH:19]=[C:20]2[C@@H:21]([O:23][CH2:24][C:25]#[C:26][C:27]([CH3:37])([O:29][Si](CC)(CC)CC)[CH3:28])[CH3:22])[CH2:12][C@@H:11]([O:45][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@@:42]2([CH3:43])[C:13](=[CH:14][CH:15]=[C:16]3[C@@H:41]2[CH2:40][CH2:39][C@@:38]2([CH3:44])[C@H:17]3[CH2:18][CH:19]=[C:20]2[C@@H:21]([O:23][CH2:24][C:25]#[C:26][C:27]([OH:29])([CH3:28])[CH3:37])[CH3:22])[CH2:12][C@@H:11]([OH:45])[CH2:10]1

Participants

4

Reactant 2

HCID 2724141Tetrabutylammonium FluorideHCID 120200581alpha,3beta-bis(tert-butyldimethylsilyloxy)-20(S)-(4-methyl-4-triethylsilyloxy-2-pentynyloxy)pregna-5,7,16-triene

Product 1

HCID 229598081alpha,3beta-dihydroxy-20(S)-(4-hydroxy-4-methyl-2-pentynyloxy)pregna-5,7,16-trieneYield 32%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

By the same procedure as in Example 9, 1α,3β-bis(tert-butyldimethylsilyloxy)-20(S)-(4-methyl-4-triethylsilyloxy-2-pentynyloxy)pregna-5,7,16-triene (80.0 mg, 0.104 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 pale yellow oil (14.0 mg, 32%).

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-7d7a5d20021f488f912bea6653a291e0
Source dataset
uspto-grants-2001_12
Patent number
US06326503B1

Reaction notes

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