Aluminium lithium hydride → HCID 22315246, compound

HRID 966614Notes

Reaction equation

HRID 966614 reaction equation
C([O:3][C:4](=O)[CH2:5][C:6]1[N:7]=[C:8]([NH:11][C:12](=[O:30])[CH:13]([C:20]2[CH:25]=[CH:24][C:23]([S:26]([CH3:29])(=[O:28])=[O:27])=[CH:22][CH:21]=2)[CH2:14][CH:15]2[CH2:19][CH2:18][CH2:17][CH2:16]2)[S:9][CH:10]=1)C.[H-].[Al+3].[Li+].[H-].[H-].[H-]>C(OCC)C>[CH:15]1([CH2:14][CH:13]([C:20]2[CH:25]=[CH:24][C:23]([S:26]([CH3:29])(=[O:28])=[O:27])=[CH:22][CH:21]=2)[C:12]([NH:11][C:8]2[S:9][CH:10]=[C:6]([CH2:5][CH2:4][OH:3])[N:7]=2)=[O:30])[CH2:16][CH2:17][CH2:18][CH2:19]1

Participants

4

Reactant 2

HCID 21226445Aluminium lithium hydride2×HCID 54244037HCID 54244037, compound

Product 1

HCID 22315246HCID 22315246, compoundYield 18.2%

Reagents, catalysts & solvents 1

HCID 3283Diethyl EtherSolvent

Conditions

Temperature
25 °C

Procedure

A solution of {2-[3-cyclopentyl-2-(4-methanesulfonyl-phenyl)-propionylamino]-thiazol-4-yl}-acetic acid ethyl ester (prepared as in Example 3(B)(d), 120 mg, 0.26 mmol) in diethyl ether (500 μL) was cooled to 0° C. and then slowly treated with lithium aluminum hydride (15 mg, 0.39 mmol). The reaction mixture was allowed to warm to 25° C. where it was stirred for 1 h. After 1 h at 25° C., thin layer chromatography still indicated the presence of the starting material. An additional amount of lithium aluminum hydride (10 mg, 0.26 mmol) was added to the reaction mixture, and the reaction mixture was allowed to stir at 25° C. for 1 h. The reaction mixture was then slowly quenched by the dropwise addition of water (10 mL). The resulting mixture was partitioned between water and ethyl acetate. The organic layer was dried over magnesium sulfate, filtered, and concentrated in vacuo. Flash chromatography (Merck Silica gel 60, 230-400 mesh, 1/3 hexanes/ethyl acetate) afforded 3-cyclopentyl-N-[4-(2-hydroxyethyl)-thiazol-2-yl]-2-(4-methanesulfonyl-phenyl)-propionamide (20 mg, 18%) as a yellow foam: mp 84-87° C.; EI-HRMS m/e calcd for C20H26N2O4S2 (M+) 422.1334, found 422.1335.

Workup

  1. customwas cooled to 0° C.
  2. waitAfter 1 h at 25° C.
  3. stirringto stir at 25° C. for 1 h
  4. customThe reaction mixture was then slowly quenched by the dropwise addition of water (10 mL)
  5. customThe resulting mixture was partitioned between water and ethyl acetate
  6. dry with materialThe organic layer was dried over magnesium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-ac427f4e79f14685b132b1846c8319e4
Source dataset
uspto-grants-2005_10
Patent number
US06951945B2

Reaction notes

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