Variation of transition state in reactions of benzensulfonyl chlorides with anilines in MeOH-MeCN solvents
作者:Ikchoon Lee、In Sun Koo
DOI:10.1016/s0040-4020(01)88691-9
日期:1983.1
Kineticstudies of nucleophilicsubstitution reactions of substituted benzensulfonyl chlorides with anilines were conducted at 35° in a range of methanol-acetonitrile solvent mixtures. Results showed that (i) the magnitudes of ϱN and β with a change of suhstituent in the nucleophile are large and indicate a relatively advanced bond-formation in the transition state, (ii) maximum size of ϱN and ϱs β
Traceless N‐Polyfluoroalkylation of Weakly Nucleophilic Nitrogen Containing Compounds
作者:Laura Santos、Florian Audet、Morgan Donnard、Armen Panossian、Jean-Pierre Vors、David Bernier、Sergii Pazenok、Frederic R. Leroux
DOI:10.1002/chem.202300792
日期:——
the high cost, toxicity or environmental impact of commonly used polyfluoroalkylation reagents. We report the sulfuryl fluoride (SO2F2)-mediated N-polyfluoroalkylation of weakly nucleophilic nitrogencompounds from readily available fluorinated alcohols. This method opens access to a variety of N-polyfluoroalkylated building blocks that are highly valuable for life science applications.
由于常用多氟烷基化试剂的高成本、毒性或环境影响, N-多氟烷基化反应具有挑战性。我们报告了硫酰氟 (SO 2 F 2 ) 介导的弱亲核氮化合物的N -多氟烷基化,这些化合物来自现成的氟化醇。该方法开启了对各种N-多氟烷基化构建块的访问,这些构建块对生命科学应用具有很高的价值。
Chemoselective Deprotection of Sulfonamides Under Acidic Conditions: Scope, Sulfonyl Group Migration, and Synthetic Applications
作者:Tomas Javorskis、Edvinas Orentas
DOI:10.1021/acs.joc.7b02507
日期:2017.12.15
Chemoselective acidic hydrolysis of sulfonamides with trifluoromethanesulfonic acid has been evaluated as a deprotection method and further extended to more complex synthetic applications. In contrast to conventional troublesome sulfonamide hydrolysis, a near-stoichiometric amount of acid was found to be sufficient to bring about efficient deprotection of various neutral or electron-deficient N-arylsulfonamides
Synthesis of SMZ derivatives and investigation of effects on germination, root,and plant growth ofArabidopsis thalianaL.
作者:Tuğba GÜNGÖR、Ferah CÖMERT ÖNDER、Fatih SEZER、Aslıhan ÖZBİLEN、Kemal Melih TAŞKIN、Mehmet AY
DOI:10.3906/kim-1901-27
日期:——
A series of sulfonamide derivatives were synthesized by reactions with various functional groups containing benzenesulfonyl chlorides and aniline derivatives under different substitution reaction conditions. The structures of SMZ derivatives were confirmed with melting point, FT-IR, $^1}$H NMR, $^13}$C NMR, and LC-MS/MS techniques. In order to investigate the cytotoxic effects of these derivatives, we used a model plant species. The synthesized compounds (S1-S5) and sulfamethazine (SMZ) as a positive control were applied to Arabidopsis thaliana seeds. Our results indicated that S3 and S4 induced shorter roots and lower wet weight in plants. Plants treated with S2 and S5 showed no growth effects, similar to the untreated control group, while S1 slightly reduced root length and wet weight. These results suggest that S3 and the newly synthesized S4 derivatives have potential for use as herbicides since they possess cytotoxic effects on A. thaliana plants.