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1-Iodopropane → (4S,5S)-tert-butyl 4-((2-(tert-butyldimethylsilyl)-5-propylthiazol-4-yl)methyl)-5-((tert-butyldimethylsilyloxy)methyl)-2,2-dimethyloxazolidine-3-carboxylate

HRID 20021
Notes
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Reaction equation

HRID 20021 reaction equation
[Si:1]([C:8]1[S:9][CH:10]=[C:11]([CH2:13][C@H:14]2[C@@H:18]([CH2:19][O:20][Si:21]([C:24]([CH3:27])([CH3:26])[CH3:25])([CH3:23])[CH3:22])[O:17][C:16]([CH3:29])([CH3:28])[N:15]2[C:30]([O:32][C:33]([CH3:36])([CH3:35])[CH3:34])=[O:31])[N:12]=1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[Li+].[CH3:38][CH2:39][CH2:40][CH2-].ICCC>C1COCC1>[Si:1]([C:8]1[S:9][C:10]([CH2:38][CH2:39][CH3:40])=[C:11]([CH2:13][C@H:14]2[C@@H:18]([CH2:19][O:20][Si:21]([C:24]([CH3:25])([CH3:27])[CH3:26])([CH3:23])[CH3:22])[O:17][C:16]([CH3:29])([CH3:28])[N:15]2[C:30]([O:32][C:33]([CH3:36])([CH3:35])[CH3:34])=[O:31])[N:12]=1)([C:4]([CH3:6])([CH3:7])[CH3:5])([CH3:2])[CH3:3]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 336431-IodopropaneHCID 61028n-Butyl lithiumHCID 67304891(4S,5S)-Tert-butyl 4-((2-(tert-butyldimethylsilyl)thiazol-4-yl)methyl)-5-((tert-butyldimethylsilyloxy)methyl)-2,2-dimethyloxazolidine-3-carboxylate

Product 1

HCID 67304570(4S,5S)-tert-butyl 4-((2-(tert-butyldimethylsilyl)-5-propylthiazol-4-yl)methyl)-5-((tert-butyldimethylsilyloxy)methyl)-2,2-dimethyloxazolidine-3-carboxylate

Reagents, catalysts & solvents

1
HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
-50 °C

Procedure

(4S,5S)-Tert-butyl 4-((2-(tert-butyldimethylsilyl)thiazol-4-yl)methyl)-5-((tert-butyldimethylsilyloxy)methyl)-2,2-dimethyloxazolidine-3-carboxylate (0.150 g, 0.269 mmol) in THF (3 mL) was cooled to −78° C. when N-BUTYLLITHIUM (2.5 M in hexanes) (0.1 19 ml, 0.296 mmol) was added dropwise. The solution was warmed to −50° C. for 40 minutes and then cooled to −78° C. 1-Iodopropane (0.0549 g, 0.323 mmol) was added dropwise and the solution was allowed to slowly warm to −50° C. and stirred for 1 hr. The reaction was quenched with saturated ammonium chloride. The layers were separated and the aqueous layer was extracted with ethyl acetate. The combined organic layers were washed with water, brine and dried over sodium sulfate to afford the title compound, which was used without further purification for the next step.

Workup

  1. additionwas added dropwise
  2. temperaturecooled to −78° C
  3. temperatureto slowly warm to −50° C.
  4. customThe reaction was quenched with saturated ammonium chloride
  5. customThe layers were separated
  6. extractionthe aqueous layer was extracted with ethyl acetate
  7. washThe combined organic layers were washed with water, brine
  8. dry with materialdried over sodium sulfate

Sources & evidence

ORD record
ord-6bcdccf952244da383a44e831ff80807
Source dataset
uspto-grants-2010_06
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07745484B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes