Hydrochloric Acid → (11R,12S,13E,15S)-9-butyryloxy-11,15-bis(tert-butyldimethylsiloxy)-7-thiaprosta-8,13-dienamide

HRID 3037

Reaction equation

HRID 3037 reaction equation
[C:1]([O:6][C:7]1[CH2:20][C@@H:19]([O:21][Si:22]([C:25]([CH3:28])([CH3:27])[CH3:26])([CH3:24])[CH3:23])[C@H:18](/[CH:29]=[CH:30]/[C@@H:31]([O:37][Si:38]([C:41]([CH3:44])([CH3:43])[CH3:42])([CH3:40])[CH3:39])[CH2:32][CH2:33][CH2:34][CH2:35][CH3:36])[C:8]=1[S:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][C:15](O)=[O:16])(=[O:5])[CH2:2][CH2:3][CH3:4].ClC(OCC(C)C)=O.[OH-].[NH4+:54].Cl>C(OCC)(=O)C.C(N(CC)CC)C.C(Cl)Cl>[C:1]([O:6][C:7]1[CH2:20][C@@H:19]([O:21][Si:22]([C:25]([CH3:28])([CH3:27])[CH3:26])([CH3:24])[CH3:23])[C@H:18](/[CH:29]=[CH:30]/[C@@H:31]([O:37][Si:38]([C:41]([CH3:44])([CH3:43])[CH3:42])([CH3:40])[CH3:39])[CH2:32][CH2:33][CH2:34][CH2:35][CH3:36])[C:8]=1[S:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][C:15]([NH2:54])=[O:16])(=[O:5])[CH2:2][CH2:3][CH3:4]

Participants

8

Reactant 4

HCID 313Hydrochloric AcidHCID 14923Ammonium HydroxideHCID 62365Isobutyl chloroformateHCID 22883780(11R,12S,13E,15S)-9-butyryloxy-11,15-bis(tert-butyldimethylsiloxy)-7-thiaprosta-8,13-dienoic acid

Product 1

HCID 22883778(11R,12S,13E,15S)-9-butyryloxy-11,15-bis(tert-butyldimethylsiloxy)-7-thiaprosta-8,13-dienamideYield 84%

Reagents, catalysts & solvents 3

HCID 6344DichloromethaneSolventHCID 8471TriethylamineSolventHCID 8857Ethyl AcetateSolvent

Procedure

A methylene chloride (3 ml) solution of (11R,12S,13E,15S)-9-butyryloxy-11,15-bis(tert-butyldimethylsiloxy)-7-thiaprosta-8,13-dienoic acid (201 mg) was cooled to -40° C., then isobutyl chloroformate (47 μl) and triethylamine (63 μl) were added to the solution which was then stirred as is at -40° C. for 30 minutes. Further 1 ml of 30% ammonium hydroxide solution was added and the mixture was stirred overnight while raising the temperature to room temperature. The reaction solution was diluted by ethyl acetate then was neutralized by dilute hydrochloric acid. The desired substance was extracted from the mixture by ethyl acetate and extract was successively washed by saturated sodium hydrogen carbonate and saturated sodium chloride solution. This solution was concentrated under reduced pressure, then was purified by silica gel column chromatography (45% ethyl acetate/hexane) to obtain (11R,12S,13E,15S)-9-butyryloxy-11,15-bis(tert-butyldimethylsiloxy)-7-thiaprosta-8,13-dienamide (169 mg, 84%).

Workup

  1. stirringthe mixture was stirred overnight
  2. extractionThe desired substance was extracted from the mixture by ethyl acetate
  3. extractionextract
  4. washwas successively washed by saturated sodium hydrogen carbonate and saturated sodium chloride solution
  5. concentrationThis solution was concentrated under reduced pressure
  6. customwas purified by silica gel column chromatography (45% ethyl acetate/hexane)

Sources & evidence

ORD record
ord-3a3271a594c4451684be2191aa815526
Source dataset
uspto-grants-1998_03
Patent number
US05731452

Linked notes

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