Acetyl chloride → methyl (1S,4R)-4-(5-{3-[(acetyloxy)methyl]-5-nitrophenyl}-1,3-thiazol-2-yl)-4-hydroxy-2,2-dimethylcyclohexanecarboxylate

HRID 1039949Notes

Reaction equation

HRID 1039949 reaction equation
[OH:1][C@:2]1([C:14]2[S:15][C:16]([C:19]3[CH:24]=[C:23]([N+:25]([O-:27])=[O:26])[CH:22]=[C:21]([CH2:28][OH:29])[CH:20]=3)=[CH:17][N:18]=2)[CH2:7][CH2:6][C@H:5]([C:8]([O:10][CH3:11])=[O:9])[C:4]([CH3:13])([CH3:12])[CH2:3]1.[C:30](Cl)(=[O:32])[CH3:31].C(N(CC)CC)C>ClCCl>[C:30]([O:29][CH2:28][C:21]1[CH:20]=[C:19]([C:16]2[S:15][C:14]([C@@:2]3([OH:1])[CH2:7][CH2:6][C@H:5]([C:8]([O:10][CH3:11])=[O:9])[C:4]([CH3:13])([CH3:12])[CH2:3]3)=[N:18][CH:17]=2)[CH:24]=[C:23]([N+:25]([O-:27])=[O:26])[CH:22]=1)(=[O:32])[CH3:31]

Participants

5

Reactant 3

HCID 6367Acetyl chlorideHCID 8471TriethylamineHCID 67433080methyl (1S,4R)-4-hydroxy-4-{5-[3-(hydroxymethyl)-5-nitrophenyl]-1,3-thiazol-2-yl}-2,2-dimethylcyclohexanecarboxylate

Product 1

HCID 67433015methyl (1S,4R)-4-(5-{3-[(acetyloxy)methyl]-5-nitrophenyl}-1,3-thiazol-2-yl)-4-hydroxy-2,2-dimethylcyclohexanecarboxylateYield 86%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of the product of Step 4 (194 mg, 0.46 mmol) dissolved in dichloromethane (1.8 mL) at −20° C. was added acetyl chloride (34 μL, 0.48 mmol) and triethylamine (129 μL, 0.92 mmol). The reaction was warmed to room temperature and stirred for 2.5 h. The reaction was quenched with saturated aqueous sodium bicarbonate, and extracted with dichloromethane (3×). The combined organic layers were washed with brine, then dried over sodium sulfate, filtered, and concentrated to afford methyl(1S,4R)-4-(5-{3-[(acetyloxy)methyl]-5-nitrophenyl}-1,3-thiazol-2-yl)-4-hydroxy-2,2-dimethylcyclohexanecarboxylate (203 mg, 0.39 mmol, 86% yield) as a yellow foam. MS ESI: [M+H]+ m/z 463.1.

Workup

  1. customThe reaction was quenched with saturated aqueous sodium bicarbonate
  2. extractionextracted with dichloromethane (3×)
  3. washThe combined organic layers were washed with brine
  4. dry with materialdried over sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-5c8d5af7effa4af6ac80f75e7be72457
Source dataset
uspto-grants-2013_10
Patent number
US08551984B2

Reaction notes

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