P-toluenesulfonicate CAS:104-15-4

Asiti ea P-toluenesulfonic (PTSA) e sebelisoa haholo tlhahisong ea lintho tse phelang le lits'ebetsong tse fapaneng tsa lik'hemik'hale ka lebaka la tlhaho ea eona e matla ea asiti le ho qhibiliha ha eona li-solvents tsa lintho tse phelang. Joaloka catalyst, PTSA e bapala karolo ea bohlokoa liketsong tsa esterification le acylation, e nolofalletsa ho thehoa ha li-ester le li-amide tse tsoang ho alcohols le carboxylic acid. Asiti ea eona e phahameng le botsitso li etsa hore e sebetse hantle haholo ho ntšetseng pele liphetoho tsena tlas'a maemo a bonolo. Ho feta moo, asiti ea p-toluenesulfonic e sebetsa e le moemeli ea matlafatsang asiti lits'ebetsong tse ngata tsa indasteri le tsa laboratori. E sebelisoa tlhahisong ea meriana, lidae le monko o monate, moo thepa ea eona ea asiti e sebelisoang ho nolofatsa phetoho e itseng ea lik'hemik'hale. PTSA e boetse e sebelisoa tlhahisong ea li-polymer le li-resin, e thusa phetohong ea meaho ea limolek'hule le taolo ea lits'ebetso tsa polymerization. Ho feta moo, asiti ea p-toluenesulfonic e sebelisoa ho lokiseng li-reagent le li-intermediate bakeng sa tlhahiso ea lintho tse phelang, e nolofalletsang tlhahiso e sebetsang ea metsoako e fapaneng ea lintho tse phelang. Tšebeliso ea eona liketsong tsa ho kolobisa, joalo ka Friedel-Crafts acylations, e bontša bohlokoa ba eona ho etseng metsoako e nkhang hamonate le li-heterocycles. Ho feta moo, PTSA e bohlokoa ho hloekiseng le ho aroleng metsoako ea lintho tse phelang, e sebetsa e le asiti e matla bakeng sa lits'ebetso tsa protonation le ho ntša. Ho qhibiliha ha eona litharollong tse tloaelehileng tsa lintho tse phelang ho lumella tšebeliso e fapaneng mekhoeng ena ea tlhoekiso, e tlatsetsa tlhahisong ea lintho tse hloekileng haholo lipatlisisong tsa lik'hemik'hale le tlhahisong. Ho phaella moo, p-toluenesulfonic acid e sebelisoa k'hemistring ea tlhahlobo e le moemeli oa titrating le modifier oa pH, e thusang ho fumana acidity le alkalities litharollong tse fapaneng. Thepa ea eona e tsitsitseng le e hlalositsoeng hantle ea asiti e etsa hore e be sesebelisoa se tšepahalang sa ho lokisa le ho leka-lekanya maemo a pH litekong tsa laboratori le lits'ebetsong tsa taolo ea boleng.