Synthesis and phosphodiesterase 5 inhibitory activity of new sildenafil analogues containing a phosphonate group in the 5(')-sulfonamide moiety of phenyl ring.
Synthesis of new sildenafil analogues containing a phosphonate group in the 5(')-sulfonamide moiety of the phenyl ring, 12a-e, 13a-d, and 14a-d, and evaluation of their in vitro PDE5 inhibitory activity are disclosed. Enzyme assays revealed that maximum 10-fold increase in PDE5 inhibitory activity, compared with sildenafil, was achieved by introducing a phosphonate group in the 5(')-sulfonamide moiety. Docking model of (PDE5: 12d) complex shows that the PDE5-bound conformation of 12d matches completely with that of sildenafil, while 12d is partially overlapped with cGMP with ethyl phosphonate group of 12d superimposed onto the cyclic phosphate group of cGMP.
Kim
Dae-Kee
DK
College of Pharmacy, Ewha Womans University, 11-1 Daehyun-dong, Seodaemun-gu, Seoul 120-750, South Korea. dkkim@ewha.ac.kr
Young Lee
Ju
J
Park
Hyun-Ju
HJ
Minh Thai
Khac
K
D015106:3',5'-Cyclic-GMP Phosphodiesterases; D054706:Cyclic Nucleotide Phosphodiesterases, Type 5; D008958:Models, Molecular; D063065:Organophosphonates / Q000737:chemistry*; D010726:Phosphodiesterase Inhibitors / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D010727:Phosphoric Diester Hydrolases / Q000187:drug effects*; D010879:Piperazines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones
D063065:Organophosphonates; D010726:Phosphodiesterase Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate; D010727:Phosphoric Diester Hydrolases; D015106:3',5'-Cyclic-GMP Phosphodiesterases; D054706:Cyclic Nucleotide Phosphodiesterases, Type 5