Solvolysis of N-nitroso-N-(1-acetoxyalkyl)alkylamines in phosphate buffer : Characterization and mutagenicity of N-nitroso-N-(1-phosphonooxyalkyl)alkylamines.
作者:Masataka Mochizuki、Takako Anjo、Naoko Sekiguchi、Atsuko Ikarashi、Atsuko Suzuki、Yuko Wakabayashi、Masashi Okada
DOI:10.1248/cpb.34.3956
日期:——
The kinetics of solvolysis of some α-acetoxy nitrosamines in phosphate buffer solution was investigated and their mutagenic products were identified. N-Nitroso-N-(1-acetoxyalkyl)alkylamines were decomposed in two ways in aqueous phosphate buffer solution : O-acyl fission yielded α-hydroxy nitrosamines which were decomposed into aldehydes and alcohols, while O-alkyl fission gave a resonance hybrid of α-N-nitroso carbonium and iminium ions which, when trapped with phosphate, afforded N-nitroso-N-(1-phosphonooxyalkyl)alkylamines. They were stable in neutral and alkaline aqueous solutions, and were mutagenic in Salmonella typhimurium TA1535 and Escherichia coli WP2 and WP2 hcr-.
在磷酸盐缓冲液中研究了一些α-醋酸氧基亚硝胺的溶解动力学,并鉴定了它们的突变产物。N-亚硝基-N-(1-醋酸氧烷基)烷基胺在水相磷酸盐缓冲液中以两种方式分解:O-酰基裂解产生α-羟基亚硝胺,后者进一步分解为醛和醇,而O-烷基裂解则生成α-N-亚硝基碳正离子和亚氨离子的共振混合物,当与磷酸盐捕获时,生成N-亚硝基-N-(1-磷酸氧烷基)烷基胺。它们在中性和碱性水溶液中稳定,并在沙门氏菌typhimurium TA1535和大肠杆菌WP2及WP2 hcr-中具有致突变作用。