Roy D, James SL, Crawford DE. Solvent-free sonochemistry as a route to pharmaceutical co-crystals.
Chem Commun (Camb) 2019;
55:5463-5466. [PMID:
31011746 DOI:
10.1039/c9cc00013e]
[Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We describe the synthesis of pharmaceutically relevant co-crystals by solvent-free sonochemistry starting from solid reagents. Employing a standard ultrasonic cleaning bath, quantitative conversions occurred within 20-60 minutes to give co-crystals of paracetamol and aspirin with a range of co-formers. As well as the utility of the method, the work raises interesting mechanistic questions regarding acoustic cavitation with no liquid phase being present.
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