Studies on topical antiinflammatory agents. II. Synthesis and vasoconstrictive activity of 21-substituted corticosteroids with sulfur-containing moieties.
作者:Morihiro MITSUKUCHI、Tomoyuki IKEMOTO、Minoru TAGUCHI、Shohei HIGUCHI、Satoshi ABE、Hajime YASUI、Katsuo HATAYAMA、Kaoru SOTA
DOI:10.1248/cpb.37.1795
日期:——
As part of the search for new topical antiinflammatory agents, various 21-substituted corticosteroids having sulfur-containing moieties were prepared and tested for vasoconstrictive activity in humans. A structure-activity relationship study revealed that substitution of the 21-hydroxy group with a lower alkyl-thio group enhanced the activity. The activities of the 21-methylthio (3Ad) and the 21-ethylthio (3Ae) compounds were more potent than that of 9α-fluoro-11β, 21-dihydroxy-16β-methyl-17α-valeroyloxy-1, 4-pregnadiene-3, 20-dione (betamethasone 17-valerate, BV).
N-Thiolated β-lactam antibacterials: Effects of the N-organothio substituent on anti-MRSA activity
作者:Bart Heldreth、Timothy E. Long、Seyoung Jang、G. Suresh Kumar Reddy、Edward Turos、Sonja Dickey、Daniel V. Lim
DOI:10.1016/j.bmc.2006.01.029
日期:2006.6
importance of the N-organothio moiety on antibacterialactivity. Our results indicate that elongation of the N-alkylthio residue beyond two carbons, or extensive branching within the organothio substituent, diminishes antibacterialeffects. Of the derivatives we examined, the N-sec-butylthio beta-lactam derivative 5g possesses the strongest growth inhibitory activity against methicillin-resistant Staphylococcus
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
A simple and inherent green photocatalytic approach using commercially available and cheap nBu4NBr with 4-CzIPN was reported to effectively initiate the site-selective α-C(sp3)-H activation of tetrahydrofuran for C-S and C-C cross-couplings.
Constructing <i>N</i>-Acyl/<i>N</i>-Sulfonyl Aza-Sulfur Derivatives from Amides/Sulfonamides and Thiophthalimides via Oxidant Regulation
作者:Yazhou Li、Yongkun Wang、Feifei Fang、Yu Zhang、Chunpu Li、Tao Yu、Qiangqiang Chen、Jiang Wang、Hong Liu
DOI:10.1021/acs.orglett.3c02166
日期:2023.8.18
Here, we have constructed five distinct types of N-acyl or N-sulfonyl aza-sulfur scaffolds using readily available (sulfon)amides and thiophthalimides with precise regulation of oxidants. Our novel methods feature one-pot mild reaction conditions and simple operation, thereby making them highly convenient for the late-stage diversification of various amide drugs, bioactive molecules, and peptides.