184530-25-4

Upstream product

• 184530-14-1 2,6-diamino-4-ethyl-4H-thiopyran-3,5-dicarbonitrile 
• 2632-10-2 2-bromo-1-(3,4-dichlorophenyl)ethanone 
• 332175-09-4 6-amino-3,5-dicyano-4-ethylpyridine-2(1H)-thione 

Relevant academic research and scientific papers

Synthesis of 2,6-diamino-3,5-dicyano-4-ethyl-4H-thiopyran and its recyclization to 6-amino-3,5-dicyano-4-ethylpyridine-2(1H)-thione

The triple condensation of propionaldehyde, malononitrile, and cyanothioacetamide gives 2,6-diamino-3,5-dicyano-4-ethyl-4H-thiopyran, which recyclizes to give 6-amino-3,5-dicyano-4-ethylpyridine-2(1H)-thione. This thione was used to synthesize substituted 2-alkylthiopyridines and the corresponding thieno[2,3-b]pyridines. 1997 Plenum Publishing Corporation.