Phenylglyoxylonitrile → HCID 9838563, compound

HRID 1953138Notes

Reaction equation

HRID 1953138 reaction equation
C([N:5]1[C:12](=O)[N:11]2[C:7](=[N:8][C:9]3[CH:17]=[CH:16][CH:15]=[CH:14][C:10]=32)[S:6]1)CCC.[C:18](C#N)(=[O:25])[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1>ClCCl>[O:25]=[C:18]([C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1)[C:12]1[N:11]2[C:7](=[N:8][C:9]3[CH:17]=[CH:16][CH:15]=[CH:14][C:10]=32)[S:6][N:5]=1

Participants

4

Reactant 2

HCID 11953PhenylglyoxylonitrileHCID 13034031HCID 13034031, compound

Product 1

HCID 9838563HCID 9838563, compoundYield 96%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A mixture of 2-butyl-1,2,4-thiadiazolo[4,5-a]benzimidazole-3(2H)-one (6.0 g, 24.3 mmole) and benzoyl cyanide (6.36 g, 48.5 mmole) in 80 mL of dichloromethane was stirred at room temperature for 24 h. The precipitate was filtered and washed with dichloromethane. The crude product was recrystallized from acetone to give 6.48 g (96%) of 3-(oxophenylmethyl)-1,2,4-thiadiazolo[4,5-a]benzimidazole as yellow crystals: mp 190-191° C.; 1H NMR (CDCl3)δ 8.35 (d, 3H), 7.82 (d, 1H), 7.73 (t, 1H), 7.59 (t, 2H), 7.50 (t, 1H), 7.36 (t, 1H) ppm; 13C NMR (CDCl3)δ 180.86, 163.69, 150.82, 146.70, 134.79, 134.34, 131.22 (2C), 129.46 (2C), 128.74, 125.82, 122.27, 119.49, 115.23 ppm; IR (KBr)ν 1671 cm-1 ; HRMS calcd for C15H9N3OS: 279.0466, found: 279.0475. Anal. Calcd for C15H9N3OS: C, 64.50;H, 3.25; N, 15.04. Found: C, 63.93;H, 3.10; N, 14.53.

Workup

  1. filtrationThe precipitate was filtered
  2. washwashed with dichloromethane
  3. customThe crude product was recrystallized from acetone

Sources & evidence

ORD record
ord-4964a52f97c341d9a9aa7adae97fd769
Source dataset
uspto-grants-2000_09
Patent number
US06114537

Reaction notes

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