An efficient diastereoselective approach for the synthesis of functionalized 3,4-dihydro-2
The first example of glycine catalyzed directly synthesis of 6-imino-2,7-dioxabicyclo[3.2.1]octane-4,4,5-tricarbonitriles in aqueous medium was described, giving products in excellent yields and up to excellent diastereoselectivities.
Non-catalytic conversion of 4-oxoalkane-1,1,2,2-tetracarbonitriles in the presence of water leads to the mixture of fluorescent 4-cyano-2-oxo-1,2-dihydropyridine-3-carboxamides and 2-oxo-1,2-dihydropyridine-3,4-dicarbonitriles in equal proportions.