1,2,5,6-Tetrahydro-1-methyl-3-pyridinecarbonyl Chloride is used in the synthesis of 6-substituted-4-(3-bromophenylamino)quinazoline derivatives which functions as irreversible inhibitor of epidermal growth factor receptor (EGFR) and human epidermal growth factor receptor (HER-2) tyrosine kinases.Also, it is an intermediate used in the synthesis of Arecaidine But-2-ynyl Ester Tosylate (A767018), which is a potent, selective mAChR M2 activator.