Anhydride Trifluoromethanesulfonic CAS: 358-23-6

Ko te N-Trifluoromethanesulfonic anhydride (Tf2O) e tohuhia ana e tōna hanganga ngota, e whakaatu ana i ngā rōpū trifluoromethanesulfonyl (-CF3SO2) e rua e honoa ana e te ngota hāora. Mā tēnei whirihoranga ka tino pai te tauhohenga me te pumau o Tf2O, ka waiho hei matū pai mō ngā huringa hanga uaua. Ko te Tf2O ka whakamahia hei wai mārama, kore tae me te pāmahana kohua teitei, ā, he kaha te wairewa i roto i ngā whakarewa waro pērā i te dichloromethane me te chloroform. Ko tōna pumau i raro i ngā āhuatanga rerekē, me tōna waikawa kaha, ka whakarei ake i tōna whai huatanga i roto i ngā hanganga waro matatini e hiahia ana ki te whakahaere tika i ngā āhuatanga tauhohenga. Ngā Whakamahinga Hanganga Waro: Ko te Tf2O he matū maha-whakamahinga i roto i te hanganga waro, inā koa i roto i ngā tauhohenga e hiahia ana ki te whakahohenga hiko kaha. He mea whakamahi noa i roto i te acylation o ngā waipiro, amines, me ngā phenols hei hanga i ngā esters, amides, me ngā sulfonamides. He mea nui tēnei kaha mō te whakawhanaketanga o ngā takawaenga rongoā, ngā matū ahuwhenua, me ngā rauemi matatau me ngā āhuatanga kua whakaritea. Matū Pūmua: I roto i ngā tukanga pūmua, ka āwhina a Tf2O i te whakarerekētanga o ngā mekameka pūmua mā roto i ngā tauhohenga sulfonation, ka whakapai ake i te wairewatanga, te pumau, me te mahi a te pūmua. Ko tōna kaha ki te whakauru i ngā rōpū waikawa sulfonic ka whakarei ake i te mahi pūmua i roto i ngā tono ahumahi maha, tae atu ki ngā paninga, ngā kiriuhi, me ngā kapia whakawhiti katote. Matū Pai: Ka kitea te tono a Tf2O i roto i te hanganga o ngā matū pai pēnei i ngā tae, ngā takawaenga rongoā, me ngā tauhohenga motuhake. Ko tōna tauhohenga whiriwhiri ka taea te mahi tika o ngā ngota waro, he mea nui mō te whakarei ake i te mahi koiora me te pumau matū i roto i ngā hua whakamutunga. Hanganga Ka hangaia te Trifluoromethanesulfonic anhydride mā te tauhohenga o te waikawa trifluoromethanesulfonic (TfOH) me te acetic anhydride. Kei roto i tēnei tukanga te tāpiri whakahaere o te acetic anhydride ki te TfOH i raro i ngā āhuatanga kore wai, ka arahi ki te hanganga o te Tf2O me te waikawa acetic hei hua taha. Ko te tikanga o te tauhohenga me whakahaere te pāmahana me te hau kore mahi kia kore ai e hiahiatia ngā tauhohenga taha me te whakarite kia nui te hua o te Tf2O. Ka whakamahia ngā tikanga purenga pēnei i te whakatōtō, te tango whakarewa rānei hei wehe i te Tf2O i roto i te parakore teitei e tika ana mō ngā mahi ahumahi. Hei whakarāpopototanga, he matū whai hua, he kaha hoki te trifluoromethanesulfonic anhydride e whakamahia whānuitia ana i roto i te hanga matū waro, te matū polymer, me te hanga matū pai. Nā tōna kaha tauhohenga pakari, pumau, me ōna āheinga mahi whiriwhiri ka tino hiahiatia i roto i te whakatairanga i ngā hangarau puta noa i ngā rāngai ahumahi me ngā kaupapa pūtaiao. Ko te hanga whakahaere me te tono tika o te Tf2O he mea nui ki te whanaketanga o ngā rauemi me ngā matū auaha me te mahi me te mahi whakarei ake.