A fundamental quest for alkyl radical generation under mild conditions through photoinduced Brønsted acid catalysis is addressed. The optimized protocol does not require any organic dyes or transition metal photocatalyst. Under blue light irradiation with diphenyl phosphate as a catalyst and dihydropyridine derivatives as a radical source, functionalized arylmethane derivatives are obtained in high
Synthesis and structure of new phosphorylated β- and γ-amino acetals containing a sterically hindered phenol group
作者:L. I. Vagapova、L. R. Amirova、A. R. Burilov、M. A. Pudovik、O. G. Sinyashin
DOI:10.1134/s1070428015090092
日期:2015.9
alpha-Phosphorylated 3,5-di-tert-butyl-4-methylidenecyclohexa-2,5-dien-1-ones reacted with 3,3-diethoxypropan- 1-amine and 4,4-diethoxybutan-1-amine to afford new alpha-amino phosphonates containing sterically hindered phenol and acetal groups.
Synthesis and Structure of Aminophosphonates Containing 3,5-Di-Tert-Butyl-4-Hydroxyphenyl and Acetal Groups
作者:Liliya I. Vagapova、Lyaysan R. Amirova、Victor V. Syakaev、Julia K. Voronina、Dmitry B. Krivolapov、Alexander R. Burilov、Michail A. Pudovik、Oleg G. Sinyashin
DOI:10.1080/10426507.2015.1071371
日期:2015.12.2
The reactions of dialkyl [(3,5-di-tert-butyl-4-oxo-2,5-cyclohexadienyl)methyl]phosphonates with N-nucleophiles (aminoacetaldehyde dimethyl acetal and diethyl [(2,2-dimethoxyethyl)aminomethyl]phosphonate give new aminophosphonates containing the 3,5-di-tert-butyl-4-hydroxyphenyl substituent, in addition to the acetal group. The crystal structure of diethyl (3,5-di-tert-butyl-4-hydroxyphenyl)[(2,2-dimethoxyethyl)amino]methyl}phosphonate is elucidated. The presence of a chiral carbon atom and prochiral phosphorus atom in the aminophosphonate products is responsible for the complicated pattern in the H-1 NMR spectra, the features of which are discussed.