Tominaga, Yoshinori published the artcileSynthesis of 2-methylthioindolizine-3-carbonitriles using nitroketene dithioacetal, Product Details of C7H7ClN2, the publication is Journal of Heterocyclic Chemistry (1988), 25(6), 1745-9, database is CAplus.
The reaction of 1-cyanomethylpyridinium chloride or bromide, with 1,1-bis(methylthio)-2-nitroethylene in the presence of Et3N in ethanol gave the corresponding 2-methylthioindolizine-3-carbonitrile I (R = H, Ph; R1 = H, Me, Et; R2 = H, Et, Ph, CH2Ph; R3 = H, Me, Et) and 2-methylthio-1-nitroindolizine-3-carbonitrile in good yields, resp. Compounds I (R-R3 = H; R = R2 = H, R1 = R3 = Me) were key intermediates for the synthesis of cycl[3,2,2]azine derivatives
Journal of Heterocyclic Chemistry published new progress about 17281-59-3. 17281-59-3 belongs to pyridine-derivatives, auxiliary class Pyridine,Nitrile,Salt, name is 1-(Cyanomethyl)pyridin-1-ium chloride, and the molecular formula is C11H16BNO3, Product Details of C7H7ClN2.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem