Towards a homologous structural series of solvatochromic ?* indicators
摘要:
Two new pi* indicators of solvent dipolarity and polarizability were synthesized and characterized with respect to their solvatochromic and acid-base properties, The new dyes, N,N-dipropyl-p-nitroaniline and N,N dibutylp-nitroaniline, are part of a homologous structural series of indicators with increasing lipophilic character, ranging from N,N-dimethyl-p-nitroaniline to N,N-dibutyl-p-nitroaniline. The new indicators are designed as specific polarity probes for the characterization of aqueous-organic interfacial systems, Visible absorption spectra for N,N-dipropyl-p-nitroaniline and N,N-dibutyl-p-nitroaniline show solvent-dependent bandshapes in a manner similar to that of the previously characterized diethyl species, Values of -s decrease slightly from N,N-diethyl-p-nitroaniline to N,N-dipropyl-p-nitroaniline, leveling off with increasing alkyl chain length, The trend in pK(BH+) for the p-nitroanilinium ions over the range from N,N-dimethyl- to N,N-dibutyl- is consistent with known trends for the corresponding anilinium ions.
Described herein are compounds that may be selectively activated to produce active anti-cancer agents in tumor cells. Also disclosed are pharmaceutical compositions comprising the compounds, and methods of treating cancer using the compounds.
Aromatic Nucleophilic Substitution of Halobenzenes with Amines under High Pressure
作者:Toshikazu Ibata、Yasushi Isogami、Jiro Toyoda
DOI:10.1246/bcsj.64.42
日期:1991.1
The nucleophilicsubstitutionreactions of aromatic halides having electron-attracting groups on ortho or para position with various primary and secondary amines were accelerated by highpressure to give the corresponding N-substituted anilines in high yields. The bulkiness of amines affects its reactivity to lower the yields of the products. Although the secondary amines are usually less reactive
Nucleophilic Substitution of Aromatic Halides with Amines under High Pressure
作者:Toshikazu Ibata、Yasushi Isogami、Jiro Toyoda
DOI:10.1246/cl.1987.1187
日期:1987.6.5
The reaction of aromatic chlorides, bromides and iodides with various primary or secondary amines in a tetrahydrofuran solution under highpressure of 6–12 kbar gave the corresponding secondary and tertiary aromatic amines. The yields of the products depend on the bulkiness of amines used. 1,4-Diazabicyclo[2.2.2]octane and quinuclidine gave N-aryl quarternary ammonium halides in high yields in contrast
在 6-12 kbar 的高压下,芳族氯化物、溴化物和碘化物与各种伯胺或仲胺在四氢呋喃溶液中反应,得到相应的仲胺和叔芳胺。产品的产率取决于所用胺的体积。与无环叔胺的低反应性相比,1,4-二氮杂双环 [2.2.2] 辛烷和奎宁环以高产率得到 N-芳基季铵卤化物。
Aniline or phenol mustards linked to DNA-affinic molecules or water-soluble aromatic rings and their use as cancer therapeutic agents
申请人:Su Tsann-Long
公开号:US20080171765A1
公开(公告)日:2008-07-17
New aniline or phenol N-mustards linked to DNA-affinity carriers (such as 9-anilinoacridines, acridines and quinolines), aminobenzamides or aminophenol ethers by a urea, carbamic acid, carbanic acid ester, hydrazineurea, hydrazinecarbamic acid ester, phenoxyurea, phenoxycarbamic acid ester linkage with improved chemical stability and anti-tumor therapeutic efficacy are provided.
Oxidative Coupling of<i>N</i>,<i>N</i>-Dialkylanilines Using Iodic Acid and Sodium Nitrite
作者:Sameerana N. Huddar、Ulhas S. Mahajan、Krishnacharya G. Akamanchi
DOI:10.1246/cl.2010.808
日期:2010.8.5
A new reagent system, a combination of iodic acid and sodium nitrite has been investigated for oxidative coupling of N,N-disubstituted anilines. A facile para-selective coupling occurs to give benz...