AMINOMETHYLATION OF GUARESCHI IMIDES: SYNTHESIS OF 2,4-DIOXO-1<i>H</i>,5<i>H</i>-3,7-SPIRO[DIAZABICYCLO[3.3.1]NONANE-9,4'- PIPERIDINE]-1,5-DICARBONITRILES
DOI:
https://doi.org/10.1007/3707Keywords:
bispidines, 3, 7-diazabicyclo[3.3.1]nonanes, 9-diazaspiro[5.5]undecane, 2, 6-dioxopiperidine-3, 5-dicarbonitrile, Guareschi imides, aminomethylation, Mannich reactionAbstract
The aminomethylation reaction of 9-benzyl-2,4-dioxo-3,9-diazaspiro[5.5]undecane-1,5-dicarbonitrile hydrochloride in the presence of primary aliphatic amines and an excess of 37% aqueous formaldehyde led to the formation of 7-substituted 1'-benzyl-2,4-dioxo-1H,5H-spiro[3,7-diazabicyclo[3.3.1]nonane-9,4'-piperidine]-1,5-dicarbonitrile derivatives.
Authors: Anastasiya N. Khrustaleva*, Konstantin A. Frolov, Victor V. Dotsenko, Nikolai A. Aksenov, Inna V. Aksenova, Sergey G. Krivokolysko