Studies on topical antiinflammatory agents. III. Synthesis of 17.ALPHA.-acyloxy-9.ALPHA.-fluoro-11.BETA.-hydroxy-16.BETA.-methyl-1,4-pregnadiene-3,20-dione 21-thio derivatives and related compounds.
作者:Morihiro MITSUKUCHI、Tomoyuki IKEMOTO、Minoru TAGUCHI、Shohei HIGUCHI、Satoshi ABE、Hajime YASUI、Katsuo HATAYAMA、Kaoru SOTA
DOI:10.1248/cpb.37.3286
日期:——
beta-methyl-1,4-pregnadiene-3, 20-dione 17-esters and relatedcompounds were synthesized and evaluated as topical antiinflammatory agents. These compounds were prepared by the reaction of 9 alpha-fluoro-11 beta,17 alpha,21-trihydroxy-16 beta-methyl-1,4-pregnadiene-3, 20-dione (betamethasone, I) 17-ester derivatives and various mercapto compounds. A structure-activity relationship study revealed that
Toll-like receptor 7 and 8 imidazoquinoline-based agonist/antagonist pairs
作者:Mu Yang、Peter G. Larson、Lincoln Brown、John R. Schultz、Tamara A. Kucaba、Thomas S. Griffith、David M. Ferguson
DOI:10.1016/j.bmcl.2022.128548
日期:2022.3
Toll-likereceptors (TLRs) 7 and 8 are key targets in the development of immunomodulatory drugs for treating infectious disease, cancer, and autoimmune disorders. These receptors can adopt both agonist and antagonist binding conformations that switch the receptor signal on or off to the downstream production of cytokines. In this study, we examined the effect of simple isomeric substitutions to the
addition of (R)-N-tert-butanesulfinyl imidates 8 to α,β-unsaturated pyrazolidinone 3a has been developed to afford pyrazolidinones 10 possessing three contiguous stereocenters with good to excellent yield and excellent diastereoselectivity. A two-step conversion of reduction and cyclization provides the bicyclic pyrazolopiperidine 12 in a good yield. A series of pyrazolopiperidine derivatives 18 with a