Proenca, Fernanda published the artcileA one-pot synthesis of substituted pyrido[2,3-b]indolizines, HPLC of Formula: 17281-59-3, the publication is Tetrahedron (2011), 67(6), 1071-1075, database is CAplus.
An efficient and novel approach to the synthesis of substituted pyrido[2,3-b]indolizine-10-carbonitriles (I; R1, R2 = Me, aryl) was developed. These structures are practically unavailable through previously described methods. The cascade transformation involves the reaction of α,β-unsaturated carbonyl compounds with a stable dimer prepared from 1-(cyanomethyl)pyridinium chloride. The reaction was performed under reflux conditions in ethanol/water and in the presence of sodium acetate. This procedure represents a eco-friendly regioselective approach to the pyrido[2,3-b]indolizine core structure.
Tetrahedron 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 C7H7ClN2, HPLC of Formula: 17281-59-3.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem