Hydrolysis ntawm β-lactam nplhaib hauv penicillin ua rau nws tsis ua haujlwm. Hmoov tsis zoo, vim yog lub siab reactivity ntawm β-lactam nplhaib, ib penicillin tuaj yeem hnov mob nrog dej hauv cov kua qaub(raws li pom hauv plab), ua rau lub nplhaib β-lactam, hauv Cov tshuaj tiv thaiv hydrolysis.
Vim li cas beta-lactam ring strain?
Vim lub nplhaib lim, β-lactams yog yooj yim hydrolyzed dua linear amides lossis loj dua lactams. … Raws li ib tug pyramidal daim ntawv cog lus geometry raug yuam raws li nitrogen atom los ntawm lub nplhaib strain, lub resonance ntawm amide daim ntawv cog lus yog txo, thiab cov carbonyl ua ntau ketone-zoo li.
Puas yog lub nplhaib beta-lactam ruaj khov?
Nws tau pom tias yog ruaj khov ntawm kwv yees li pH 5 hauv cov kua dej aqueous (ntawm 35 ° C) [35], thiab kom ruaj khov dua li lwm cov β-lactams nyob rau hauv nruab nrab los yog acidic tej yam kev mob. Qhov kev ruaj ntseg nce ntxiv yog tshwm sim los ntawm kev txo qis ntawm lub nplhaib β-lactam vim nws tsis txuas rau lub nplhaib thib ob (Daim duab 1B) [35].
Lub nplhaib beta-lactam ua haujlwm li cas hauv penicillin?
Penicillin thiab feem ntau lwm yam tshuaj tua kab mob β-lactam ua by inhibiting penicillin-binding proteins, uas ib txwm ua rau kev sib txuas ntawm cov kab mob ntawm phab ntsa. Thaum tsis muaj β-lactam tshuaj tua kab mob (sab laug), phab ntsa ntawm tes ua lub luag haujlwm tseem ceeb hauv kev tsim cov kab mob.
Dab tsi ua rau lub nplhaib beta-lactam?
Beta-lactamases yog ib tsev neeg ntawm cov enzymes koom nrog cov kab mob ua rau cov tshuaj tua kab mob beta-lactam. Lawv ua los ntawm kev tawg lub nplhaib beta-lactam uas tso cai rau cov tshuaj tua kab mob zoo li penicillin ua haujlwm.
