In 2008,Norris, Timothy; Leeman, Kyle published 《Development of a New Variant of the Migita Reaction for Carbon-Sulfur Bond Formation Used in the Manufacture of Tetrahydro-4-[3-[4-(2-methyl-1H-imidazol-1-yl)phenyl]thio]phenyl-2H-pyran-4-carboxamide》.Organic Process Research & Development published the findings.HPLC of Formula: 31938-07-5 The information in the text is summarized as follows:
Palladium-catalyzed carbon-sulfur bond formation using modified Migita reaction conditions was explored and applied to the synthesis of a former antiasthma drug candidate, tetrahydro-4-[3-[4-(2-methyl-1H-imidazol-1-yl)phenyl]thio]phenyl-2H-pyran-4-carboxamide (1). The reaction was developed into a general method for thioaryl halide cross-coupling, and a specific example of its use to synthesize a key intermediate, tetrahydro-4-[3-(4-fluorophenyl)thio]phenyl-2H-pyran-4-carboxamide was demonstrated at large scale to provide phase II clin. supplies of 1. Comparison of the multistep phase I process and the two-step phase II process showed an overall yield advantage over the bond-forming steps from common starting material to active pharmaceutical ingredient API 1 of 40%. The ligand effect in the modified Migita reaction is described in detail. The second step of the scale-up process illustrated formation of carbon-nitrogen bonds without use of palladium catalysis, providing a contrast to the first reaction; both reactions were developed into efficient single-vessel direct isolation processes. The experimental process involved the reaction of 2-(3-Bromophenyl)acetonitrile(cas: 31938-07-5HPLC of Formula: 31938-07-5)
2-(3-Bromophenyl)acetonitrile(cas: 31938-07-5) has been used in the synthesis of a series of aminoethylbiphenyls, novel 5-HT7 receptor ligands or 2-(1-cyano-1-(3-bromophenyl))methylidene-3-phenylthiazolidine-4,5-dione.HPLC of Formula: 31938-07-5
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts