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Phenacyl mercaptoimidazole; acetic anhydride; imidazo[2,1-b] thiazole; Single crystal

Attempted cyclodehydration of phenacyl mercaptoimidazole hydrobromide with acetic anhydride gave an abnormal product lacking the phenyl group. The molecular structure is confirmed using X-ray crystal structure studies. Phenacyl mercaptobenzimidazole hydrobromide behaved similarly. Analysis of crystalstructure revealed an intermolecular S…Br chalcogen bonding interaction

SHASHIPRABHA¹ K NAGARAJAN^{1 2} SAJESH P THOMAS³ SURESH P NAYAK⁴ K SUNDARRAJA RAO¹ K SHRIDHARA¹ T N GURU ROW³

1. Alkem Laboratories Ltd., R&D Centre, Bangalore 560 058, Karnataka, India
2. #1, 1st Floor, House No. 007. Serene Urbana, Ozone Urbana, Southegowdanahalli, Bangalore 562 110, India
3. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, Karnataka, India
4. Department of Chemistry, Mangalore University, Mangalore, Karnataka, India

Published

5 September 2020

Manuscript received

15 April 2020

Manuscript revised

23 June 2020

Accepted

4 July 2020