Question-42
نویسنده خبر : مدیر سایت    
تاریخ درج خبر : 1397/6/13

What role does the acetoxy group at the 3-position of cephalosporins have in enhancing 

- What role does the acetoxy group at the 3-position of cephalosporins have in enhancing antibacterial activity?


A - It acts as a steric shield and masks enzymatic attack at the β-lactam ring.

B - It acts as a good leaving group when the β-lactam ring is opened.

C -  It takes part in a transesterification reaction with the carboxylic acid group at position 4.

D -  It increases the reactivity of the β-lactam ring by neighbouring group participation.













Answer (B)
از   0   رای
0

  نظرات

کلیه حقوق این وبسایت متعلق به پزشک کلاب می باشد