221470-25-3Relevant academic research and scientific papers
An efficient catalyst free synthesis of nitrogen containing spiro heterocycles via [5 + 1] double Michael addition reaction
Aggarwal, Komal,Vij, Kanika,Khurana, Jitender M.
, p. 13313 - 13321 (2014)
2,4-Diazaspiro[5.5]undecane-1,3,5,9-tetraones and 3-thioxo-2,4- diazaspiro[5.5]undecane-1,5,9-triones have been synthesized via double Michael addition of 1,5-diaryl-1,4-pentadien-3-one with active methylene compounds such as N,N-dimethyl barbituric acid, barbituric acid, thio-barbituric acid and N,N-diphenyl thiobarbituric acid in ethylene glycol at 100°C in the absence of any catalyst to give high yields within a short reaction time. The structure has been confirmed by X-ray analysis. The single-crystal structure of the diazaspiro compound revealed that the CAr-H...π, π-π stacking and intermolecular hydrogen bonding interactions act as major driving forces for crystal packing. This journal is the Partner Organisations 2014.
