Chemical modification of plant alkaloids. I. Aminomethylation of barbituric acid derivatives by cytisine
摘要:
Reaction of cytisine with 1-mono- and 1,3-disubstituted 5-arylmethylbarbituric acids in the presence of formaldehyde results in aminomethylation of C-5 to form the corresponding 5-cytisylmethylbarbituric acids. The structures of the products are found using PMR spectroscopy mid mass spectrometry. 1-Phenyl-5-(2,4-dimethoxybenzyl)-5-cytisylmethylbarbituric acid is obtained as a mixture of two steroisomers in an approximately 2:1 ratio.
Chemical modification of plant alkaloids. I. Aminomethylation of barbituric acid derivatives by cytisine
作者:K. A. Krasnov、V. G. Kartsev、A. S. Gorovoi
DOI:10.1007/bf02236429
日期:2000.3
Reaction of cytisine with 1-mono- and 1,3-disubstituted 5-arylmethylbarbituric acids in the presence of formaldehyde results in aminomethylation of C-5 to form the corresponding 5-cytisylmethylbarbituric acids. The structures of the products are found using PMR spectroscopy mid mass spectrometry. 1-Phenyl-5-(2,4-dimethoxybenzyl)-5-cytisylmethylbarbituric acid is obtained as a mixture of two steroisomers in an approximately 2:1 ratio.
Sonochemical synthesis of benzylidene derivatives of enolizable carbonyls and their analogues in aqueous ethanol
作者:Palak J. Patel、Hiren R. Chaudhary、Vivek K. Gupta、Divyang M. Patel
DOI:10.1007/s11164-023-05168-3
日期:2024.3
benzylidene derivatives via a direct sp3 C–H olefination reaction of enolizable carbonyls. We remarkably emphasize the synthetic utility of these derivatives and validate the molecular structures using 1H-NMR and 13C-NMRspectroscopy (APT) as well as SC-XRD investigation of representative compounds. Graphical abstract