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11/9/2010




              ACE INHIBITORS,
               ANTAGONISTS &
                    BLOCKERS
                                   Malina Jasamai
                        Faculty of Pharmacy, UKM
                       malina@pharmacy.ukm.my




 Blood pressure regulation by renin-
  angiotensin system
  - ACE
  - angiotensin II receptors
  - renin
 Regulation of aldosterone secretion




BACKGROUND KNOWLEDGE




 Predicts metabolites produced by ACE
  inhibitors and angiotensin anatagonists
 Relates modification of functional groups
  with potency of ACE inhibitors and
  angiotensin anatagonists




LEARNING OUTCOMES




                                                           1
11/9/2010




   Wilson & Gisvold’s textbook of organic
    Medicinal & pharmaceutical chemistry,
    12th ed. Beale Jr., J.M. & Block, J.H.,
    Lippincott Williams & Wilkins




REFERENCES




anthropology.net/2007/07/30/find...yme-ace/




ACE INHIBITORS




Active site presumed to be the arginine
 residue
 - provide cationic site which attract
   carboxylate & zinc ions
 Side effects of rash & loss sense of taste
 with thiol containing compound




ACE INHIBITORS




                                                      2
11/9/2010




                         O                                O
                                                 HO
         HO                           O      O
                             OH
              O                                           N
                                             N
                                             H   O
        Benzylsuccinic acid                 Ramipril


                                      O      O
         HS              O
                             O
                                                          N
                     N                       N
                                 OH          H        O       OH
                                                          O
                  Captopril               Enalapril




ACE INHIBITORS




   Losartan
    - nonpeptide drug
    - parent drug & metabolite both has high
      affinity fot T1.
    - acidic tetrazole involves in binding
    - biphenyl separates tetrazole from
      aliphatic N




ANGIOTENSIN ANTAGONISTS




 Ibersartan
  - doesn’t possess acidic side chain
 Valsartan
  - COOH chain in valine moiety




ANGIOTENSIN ANTAGONISTS




                                                                          3
11/9/2010




                       OH
                            Cl                           O

                   N        N                            N
    N  NH                             N  NH                    N
    N N                               N N

            Losartan                              Ibersartan


                                              OH

                                        N     O
                 N  NH
                 N N
                                             O


                                 Valsartan




ANGIOTENSIN ANTAGONISTS




                                                                          4

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Aces [compatibility mode]

  • 1. 11/9/2010 ACE INHIBITORS, ANTAGONISTS & BLOCKERS Malina Jasamai Faculty of Pharmacy, UKM malina@pharmacy.ukm.my  Blood pressure regulation by renin- angiotensin system - ACE - angiotensin II receptors - renin  Regulation of aldosterone secretion BACKGROUND KNOWLEDGE  Predicts metabolites produced by ACE inhibitors and angiotensin anatagonists  Relates modification of functional groups with potency of ACE inhibitors and angiotensin anatagonists LEARNING OUTCOMES 1
  • 2. 11/9/2010  Wilson & Gisvold’s textbook of organic Medicinal & pharmaceutical chemistry, 12th ed. Beale Jr., J.M. & Block, J.H., Lippincott Williams & Wilkins REFERENCES anthropology.net/2007/07/30/find...yme-ace/ ACE INHIBITORS Active site presumed to be the arginine residue - provide cationic site which attract carboxylate & zinc ions  Side effects of rash & loss sense of taste with thiol containing compound ACE INHIBITORS 2
  • 3. 11/9/2010 O O HO HO O O OH O N N H O Benzylsuccinic acid Ramipril O O HS O O N N N OH H O OH O Captopril Enalapril ACE INHIBITORS  Losartan - nonpeptide drug - parent drug & metabolite both has high affinity fot T1. - acidic tetrazole involves in binding - biphenyl separates tetrazole from aliphatic N ANGIOTENSIN ANTAGONISTS  Ibersartan - doesn’t possess acidic side chain  Valsartan - COOH chain in valine moiety ANGIOTENSIN ANTAGONISTS 3
  • 4. 11/9/2010 OH Cl O N N N N NH N NH N N N N N Losartan Ibersartan OH N O N NH N N O Valsartan ANGIOTENSIN ANTAGONISTS 4