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Ethanol → Ethyl 1-{4-[(4-hydroxymethyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-thiazol-2-yl}piperidine-4-carboxylate

HRID 2221640
Notes
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Reaction equation

HRID 2221640 reaction equation
[CH:1]([C:3]1[CH:27]=[CH:26][C:6]([O:7][CH2:8][C:9]2[N:10]=[C:11]([N:15]3[CH2:20][CH2:19][CH:18]([C:21]([O:23][CH2:24][CH3:25])=[O:22])[CH2:17][CH2:16]3)[S:12][C:13]=2[CH3:14])=[C:5]([O:28][CH3:29])[CH:4]=1)=[O:2].C(O)C.[BH4-].[Na+].O>O1CCCC1>[OH:2][CH2:1][C:3]1[CH:27]=[CH:26][C:6]([O:7][CH2:8][C:9]2[N:10]=[C:11]([N:15]3[CH2:16][CH2:17][CH:18]([C:21]([O:23][CH2:24][CH3:25])=[O:22])[CH2:19][CH2:20]3)[S:12][C:13]=2[CH3:14])=[C:5]([O:28][CH3:29])[CH:4]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 702EthanolHCID 962WaterHCID 4311764Sodium borohydrideHCID 86605740Ethyl 1-{4-[(4-formyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-thiazol-2-yl}piperidine-4-carboxylate

Product 1

HCID 69215032Ethyl 1-{4-[(4-hydroxymethyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-thiazol-2-yl}piperidine-4-carboxylateYield 95%

Reagents, catalysts & solvents

1
HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of ethyl 1-{4-[(4-formyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-thiazol-2-yl}piperidine-4-carboxylate (1.56 g) in tetrahydrofuran (30 mL)-ethanol (5 mL) was gradually added sodium borohydride (70 mg) at 0° C. After stirring at 0° C. for 1 hr, water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate and concentrated to give ethyl 1-{4-[(4-hydroxymethyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-thiazol-2-yl}piperidine-4-carboxylate as colorless crystals (1.48 g, yield 95%). Recrystallization from ethyl acetate-hexane gave colorless prism crystals. melting point: 84-85° C.

Workup

  1. customat 0° C
  2. extractionthe mixture was extracted with ethyl acetate
  3. washThe organic layer was washed with saturated brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-55ec8ee07ba6460e87d6d19ee06297a7
Source dataset
uspto-grants-2008_05
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07368578B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes