Transnitrosation by N-Aryl-N-nitrosoureas; NO-Carrying O-Nitrosoisourea.
作者:Masayuki TANNO、Shoko SUEYOSHI、Naoki MIYATA
DOI:10.1248/cpb.42.1760
日期:——
Transfer of nitroso groups, so-called transnitrosation, from aromatic N-nitroso compounds such as N-nitrosoureas, N-nitrosamides and N-nitrosamines, to aromatic amines or ureas was observed under non-acidic conditions at room temperature. Sterically hindered 3, 3-dibenzyl-1-(4-tolyl)-1-nitrosourea (1a) rapidly nitrosates indoline, N-alkylanilines or 3-methyl-1-(4-tolyl)urea to give their N-nitroso derivatives. In the case of N, N-dimethylanilines, nitrosative demethylation occurs to give N-methyl-N-nitrosanilines. The transnitrosation is accelerated by electron-releasing groups on the nitroso acceptors, N-alkylanilines. The transnitrosation mechanism is considered to be as follows : N-nitrosourea (1) thermally decomposes to nitric oxide and ureidyl radical followed by formation of an O-nitrosoisourea intermediate (10), which acts as an NO-carrying agent and nitrosates anilines or ureas.
作者:Giancarlo Verardo、Angelo G. Giumanini、Paolo Strazzolini
DOI:10.1016/s0040-4020(01)86768-5
日期:——
The reaction between alkyl nitrites, particularly n-butyl nitrite, and tertiaryaromaticamines under a variety of experimental conditions promptly yielded products of N-dealkylation-N-nitrosation, ring nitration, ipso-substitution and, occasionally, combinations of these processes. Aminoethers were detected as final products and intermediates on the way to N-nitrosations. Reaction pathways are suggested
FLUOROGENIC PH SENSITIVE DYES AND THEIR METHOD OF USE
申请人:Beacham Daniel
公开号:US20080274907A1
公开(公告)日:2008-11-06
A new class of pH sensitive fluorescent dyes and assays relating thereto are described. The dyes and assays are particularly suited for biological applications including phagocytosis and monitoring intracellular processes. The pH sensitive fluorescent dyes of the present invention include compounds of Formula I:
wherein the variables are described throughout the application.
Fluorogenic pH sensitive dyes and their method of use
申请人:LIFE TECHNOLOGIES CORPORATION
公开号:US10845373B2
公开(公告)日:2020-11-24
A new class of pH sensitive fluorescent dyes and assays relating thereto are described. The dyes and assays are particularly suited for biological applications including phagocytosis and monitoring intracellular processes. The pH sensitive fluorescent dyes of the present invention include compounds of Formula I:
wherein the variables are described throughout the application.
本文描述了一类新型 pH 值敏感荧光染料及其检测方法。这些染料和检测方法特别适用于生物应用,包括吞噬和监测细胞内过程。本发明的 pH 敏感荧光染料包括式 I 的化合物:
其中的变量在整个应用中均有描述。