Oxygenated dienes and the synthesis of methylenedioxybiphenyl derivatives
作者:E.J.J. Grabowski、R.L. Autrey
DOI:10.1016/s0040-4020(01)82970-7
日期:1969.1
function in a tetrahydrophthalic acidderivative was achieved, allowing esterification of the other and removal of the first in an oxidative decarboxylation. The oxidative decarboxylation was brought about by 2,3-dichloro-5,6-dicyanobenzoquinone, a novel reaction for quinones. The combination of these reactions allowed selective syntheses of 2- and 3-piperonylbenzoic acids (17 and 19) and their ethyl esters
Reaction of malondialdehyde with guanine nucleosides: formation of adducts containing oxadiazabicyclononene residues in the base-pairing region
作者:Lawrence J. Marnett、Ashis K. Basu、Shawn M. O'Hara、Paul E. Weller、A. F. M. Maqsudur. Rahman、John P. Oliver
DOI:10.1021/ja00266a065
日期:1986.3
Mechanism of Reaction of β-(Aryloxy)acroleins with Nucleosides
作者:G. Ramachandra Reddy、Lawrence J. Marnett
DOI:10.1021/tx950105t
日期:1996.1.1
The mechanism of DNA adduct formation by acroleins substituted with good leaving groups in the beta-position was investigated using [3-H-2]-3-(p-nitrophenoxy)acrolein (1). Reaction of 1 with guanosine at acidic pH produced 9-beta-D-ribofuranosylpyrimido[1,2-a]purin-10(3H)-one containing equal amounts of deuterium at both carbons 6 and 8, indicating that hydrolysis of 1 to beta-hydroxyacrolein (malondialdehyde) occurred prior to reaction with guanosine. In contrast, reaction of 1 with deoxyguanosine at neutral pH produced 9-(beta-o-2'-deoxyribofuranosyl)pyrimido[1,2-a]purin-10(3H)-one with deuterium selectively incorporated at position 8. This indicates that the pyrimido[1,2-a]purin-10(3H)-one adduct forms by 1,2-addition of the exocyclic amino group of deoxyguanosine to the aldehyde carbon of 1 followed by cyclization with the ring nitrogen. In concert with these observations, reaction of 1 with p-nitroaniline produced 3-[(p-nitrophenyl)amino]acrolein with deuterium exclusively in the aldehyde carbon. These observations define the chemical steps in DNA adduct formation by acroleins substituted at the beta-position with good leaving groups. In addition, they explain the relatively modest dependence of mutagenicity on leaving group ability in this series of compounds.