Lintho tsa Lik'hemik'hale | Di-tert-butyl dicarbonate (BOC Anhydride, DiBOC) ke likristale tse se nang 'mala ho isa ho tse tšoeu ho isa ho tse mosehla, boima bo tiileng kapa mokelikeli o hlakileng.E qhibiliha ho pota mocheso oa kamore (mp=23°C).Ha e bole sebakeng sena kapa esita le mocheso o phahameng hanyane.Mohlala, hangata e hloekisoa ka ho tšeloa tlas'a khatello e fokotsehileng mochesong o fihlang ho 65°C.Ha lithempereichara tse holimo li tla bola ho ba isobutene, joala ba t-butyl le carbon dioxide. |
Lisebelisoa | Di-tert-butyl dicarbonate (Boc2O) ke sesebelisoa se sebelisoang haholo ho hlahisa lihlopha tse sireletsang ka har'a peptide synthesis.E phetha karolo ea bohlokoa ho lokiseng 6-acetyl-1,2,3,4-tetrahydropyridine ka ho itšoara ka 2-piperidone.E sebetsa e le sehlopha se sireletsang se sebelisoang molemong oa ho kopanya peptide e tiileng. |
Tokisetso | Ho lokisoa ha Di-tert-butyl dicarbonate ke ka tsela e latelang: Ho motsoako oa letsoai oa sodium monoester o ile oa eketsoa 2g ea N, N-dimethylformamide, 1g ea pyridine, 1g ea triethylamine, Pholiso ho -5 ~ 0 ° C, 60g diphosgene e ne e le butle-butle. e kenyellelitsoe ho theoha ka har'a 1.5h dropwise keketso e phethiloe, e futhumetse mocheso oa kamore (25 ° C), e kenngoa bakeng sa 2h, karabelo e ile ea lumelloa ho ema ka mor'a ho sefa, ho hlatsoa tharollo ea organic.E omisitsoe ka anhydrous magnesium sulfate, solvent e ile ea ntšoa ka khatello ea sepakapaka ho fana ka sehlahisoa se tala 65 ~ 70g.Ka mor'a ho pholile le ho kristale, 57-60g ea di-tert-butyl dicarbonate e ile ea fumanoa ka lihlahisoa tsa 60-63%. |
Tlhaloso | ChEBI: Di-tert-butyl dicarbonate ke acyclic carboxylic anhydride.E sebetsa e amana le dicarbonic acid. |
Boitšoaro | Boitšoaro ba li-aniline tse nketsoeng sebaka le Boc2O ka boteng ba palo ea stoichiometric ea 4-dimethylaminopyridine (DMAP) ka har'a motsoako o sa sebetseng (acetonitrile, dichloromethane, ethyl acetate, tetrahydrofuran, toluene) mocheso oa kamore o lebisa ho aryl isocyanates hoo e batlang e le ka bongata ba 10. min. Di-tert-butyl dicarbonate le 4-(dimethylamino)pyridine li hlahlobiloe hape.Boitšoaro ba bona ka li-amine le lino tse tahang |
Tlhaloso e Akaretsang | Di-tert- butyl dicarbonate (Boc2O) ke reagent e sebelisoang haholo ho kenyelletsa sehlopha sa ts'ireletso sa Boc ho amine functionalities.E boetse e sebelisoa e le ntho e senyang metsi ka har'a lintho tse ling tsa tlhaho, haholo-holo ka li-carboxylic acid, lihlopha tse itseng tsa hydroxyl, kapa ka li-nitroalkane tsa mantlha. |
Kotsi | Ntho e halefisang e ka bakang kotsi e mpe ea mahlo;E ka etsa hore letlalo le utloe bohloko;E chefo haholo ka ho hema |
Ho chesa le ho phatloha | E tukang mollo |
Mekhoa ea ho Hloekisa | Qhibiliha ester ka ho futhumatsa ho ~ 35o, 'me u e tšele ka har'a vacuum.Haeba IR le NMR (1810m 1765 cm-1 , ho CCl4 1.50 singlet) li fana ka maikutlo a hore ha li hloeke haholo, joale li hlatsoe ka tekanyo e lekanang ea H2O e nang le citric acid ho etsa hore lesela le nang le metsi le be le asiti hanyenyane, bokella lesela la manyolo le le omisa holim'a anhydrous MgSO4. 'me u e tšele ka har'a vacuum.[Mopapa le ba bang.Org Synth 57 45 1977, Keller et al.Org Synth 63 160 1985, Grehn et al.Angew Chem 97 519 1985.] E HLAHANG. |