Langdon SM, Gravel M. An Alternative Method for the Synthesis of
N-Pentafluorophenyl Triazolium Salts.
Org Lett 2022;
24:7168-7172. [PMID:
36169221 DOI:
10.1021/acs.orglett.2c02863]
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Abstract
A route for the synthesis of 1,2,4-triazolium salts via oxidation of a thione precursor is demonstrated. N-Pentafluorophenyl-substituted salts are produced in 20-63% overall yields. Isolation and purification of the azolium salts are simplified compared to the traditional synthetic route. Late-stage selection of the counterion allows the synthesis of a variety of salts from a parent thione. The salts have been compared in Stetter and cross-benzoin reactions with an appreciable counterion effect in both reactions.
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