Tetrahydrofuran → HCID 13826513, compound

HRID 1906679Notes

Reaction equation

HRID 1906679 reaction equation
[H-].[Al+3].[Li+].[H-].[H-].[H-].O1CCCC1.C([O:14][C:15](=O)[C@@H:16]([C@@H:30]1[C@:47]2([CH3:48])[C@H:33]([C@H:34]3[C@H:44]([CH2:45][CH2:46]2)[C@:42]2([CH3:43])[C:37]([CH2:38][C@@H:39]([O:56][CH:57]4[CH2:62][CH2:61][CH2:60][CH2:59][O:58]4)[CH2:40][C@@H:41]2[O:49][CH:50]2[CH2:55][CH2:54][CH2:53][CH2:52][O:51]2)=[CH:36][CH2:35]3)[CH2:32][CH2:31]1)[CH2:17][CH2:18][C@@H:19]([F:29])[C:20]([O:23][CH:24]([O:26][CH2:27][CH3:28])[CH3:25])([CH3:22])[CH3:21])C>CCOCC>[O:51]1[CH2:52][CH2:53][CH2:54][CH2:55][CH:50]1[O:49][C@@H:41]1[C@@:42]2([CH3:43])[C:37](=[CH:36][CH2:35][C@@H:34]3[C@@H:44]2[CH2:45][CH2:46][C@@:47]2([CH3:48])[C@H:33]3[CH2:32][CH2:31][C@@H:30]2[C@H:16]([CH2:15][OH:14])[CH2:17][CH2:18][C@@H:19]([F:29])[C:20]([O:23][CH:24]([O:26][CH2:27][CH3:28])[CH3:25])([CH3:22])[CH3:21])[CH2:38][C@@H:39]([O:56][CH:57]2[CH2:62][CH2:61][CH2:60][CH2:59][O:58]2)[CH2:40]1

Participants

5

Reactant 3

HCID 8028Tetrahydrofuran2×HCID 13826511HCID 13826511, compoundHCID 21226445Aluminium lithium hydride

Product 1

HCID 13826513HCID 13826513, compound

Reagents, catalysts & solvents 1

HCID 3283Diethyl EtherSolvent

Conditions

Temperature
50 °C

Procedure

To a mixture of 0.34 g. (0.0090 mole) of lithium aluminum hydride and 17 ml. of tetrahydrofuran at 0° C. was added 4.26 g. of [1α,3β,24R]-1,3-bis[(tetrahydro-2H-pyran-2-yl)oxy]-25-(1-ethoxyethoxy)-24-fluorocholest-5-en-21-oic acid ethyl ester in 60 ml. of tetrahydrofuran. The mixture was heated at 50° C. for 1.5 hr, recooled to 0° C., and diluted with 200 ml. of ether. The mixture was then quenched with the dropwise addition of 0.68 ml. of water and 0.55 ml. of 10% aqueous sodium hydroxide. The mixture was stirred at 25° C. for 0.5 hr and was filtered. The solids were triturated with ether and filtered. Evaporation of solvent afforded [1α,3β,24R]-1,3-bis[(tetrahydro-2H-pyran-2-yl)oxy]-25-(1-ethoxyethoxy)-24-fluorocholest-5-en-21-ol, [α]D25 +7° (c 1.1, CHCl3).

Workup

  1. additionTo a mixture of 0.34 g
  2. customrecooled to 0° C.
  3. additiondiluted with 200 ml
  4. customThe mixture was then quenched with the dropwise addition of 0.68 ml
  5. filtrationwas filtered
  6. customThe solids were triturated with ether
  7. filtrationfiltered
  8. customEvaporation of solvent

Sources & evidence

ORD record
ord-e5e71f233b8547ef80463d2c29e61ebc
Source dataset
uspto-grants-1987_03
Patent number
US04652405

Reaction notes

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