Ye, Fei published the artcileRuthenium-Catalyzed [2 + 2 + 2] Cycloaddition Reaction Forming 2-Aminopyridine Derivatives from α,ω-Diynes and Cyanamides, Category: amides-buliding-blocks, the publication is Organic Letters (2017), 19(5), 1104-1107, database is CAplus and MEDLINE.
A novel, efficient, and mild synthetic route for the preparation of 2-aminopyridines , e. g., I, via ruthenium-mediated [2 + 2 + 2] cycloaddition of α,ω-diynes and cyanamides has been developed. This atom-economical catalytic process demonstrated remarkable regioselectivities to access pyridine derivatives of high synthetic utility.
Organic Letters published new progress about 2451-91-4. 2451-91-4 belongs to amides-buliding-blocks, auxiliary class Nitrile,Amine,Benzene, name is N,N-Dibenzylcyanamide, and the molecular formula is C16H24BF4Ir, Category: amides-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics