Synfacts, Table of Contents Synfacts 2023; 19(01): 0011DOI: 10.1055/s-0042-1751809 Synthesis of Heterocycles Preparation of 4-Iodo-1-tosylpyrazoles via Iodocyclization of N-Propargyl-N′-tosylhydrazines(Pfizer) Contributor(s): Paul Richardson , Tim KwokRecommend Article Abstract Buy ArticleKey words Key wordspyrazoles - tosylhydrazines - molecular iodine - alkynes - iodocyclization - transition-metal-free Full Text