2-Methylbenzenesulfonic acid → HCID 21455445, compound

HRID 435539Notes

Reaction equation

HRID 435539 reaction equation
[C:1]([C:5]1[S:9][C:8]([N:10]2[CH:15]([OH:16])[CH2:14][CH2:13][N:12]([CH3:17])[C:11]2=[O:18])=[N:7][N:6]=1)([CH3:4])([CH3:3])[CH3:2].[C:19](OC(=O)C)(=[O:21])[CH3:20].C1(C)C(S(O)(=O)=O)=CC=CC=1>C1C=CC=CC=1>[C:1]([C:5]1[S:9][C:8]([N:10]2[CH:15]([O:16][C:19](=[O:21])[CH3:20])[CH2:14][CH2:13][N:12]([CH3:17])[C:11]2=[O:18])=[N:7][N:6]=1)([CH3:4])([CH3:2])[CH3:3]

Participants

5

Reactant 3

HCID 69252-Methylbenzenesulfonic acidHCID 7918Acetic AnhydrideHCID 21400082tetrahydro-1-(5-t-butyl-1,3,4-thiadiazol-2-yl)-3-methyl-6-hydroxy-2(1H)-pyrimidinone

Product 1

HCID 21455445HCID 21455445, compound

Reagents, catalysts & solvents 1

HCID 241BenzeneSolvent

Procedure

Tetrahydro-1-(5-t-butyl-1,3,4-thiadiazol-2-yl)-3-methyl-6-hydroxy-2 (1H)-pyrimidinone (0.1 mole), acetic anhydride (0.11 mole), toluenesulfonic acid (0.05 gram) and benzene (100 ml) are charged into a glass reaction vessel equipped with a mechanical stirrer and thermometer. The reaction mixture is heated on a steam bath with stirring for a period of about 2 hours. After this time the reaction mixture is cooled to room temperature and is stripped of solvent under reduced pressure leaving a residue. The residue is recrystallized to yield the desired product tetrahydro-1-(5-t-butyl-1,3,4-thiadiazol-2-yl)-3-methyl-6-acetyloxy-2(1H) -pyrimidinone.

Workup

  1. customequipped with a mechanical stirrer
  2. temperatureThe reaction mixture is heated on a steam bath
  3. customleaving a residue
  4. customThe residue is recrystallized

Sources & evidence

ORD record
ord-a6e5224c8a8e48089af552465ddbad18
Source dataset
uspto-grants-1977_02
Patent number
US04006009

Reaction notes

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