Metal-free synthesis of α-acyloxy ketones from carboxylic acids and sulfoxonium ylides
作者:Naveen Kumar、Satyendra Kumar Pandey
DOI:10.1039/d3ob01683h
日期:——
described for synthesizing α-acyloxy ketonesfrom β-ketosulfoxonium ylides and carboxylic acids. Moderate to high yields of α-acyloxy ketones were produced using sulfoxonium ylides and carboxylic acids adorned with various functional groups. Eventually, the applicability of this approach has been shown via a large-scale reaction and transforming the synthesized α-acyloxy ketone derivatives into other valuable
BRILLIANT BLUE (BBG) DYE DERIVATIVES AND STAINING COMPOSITIONS COMPRISING THE SAME FOR SELECTIVELY STAINING BIOLOGICAL SUBSTRATES
申请人:Alfa Instruments S.r.l.
公开号:EP3692101B1
公开(公告)日:2022-01-12
[EN] BRILLIANT BLUE (BBG) DYE DERIVATIVES AND STAINING COMPOSITIONS COMPRISING THE SAME FOR SELECTIVELY STAINING BIOLOGICAL SUBSTRATES<br/>[FR] DÉRIVÉS DE COLORANT BLEU BRILLANT (BBG) ET COMPOSITIONS DE COLORATION LES COMPRENANT POUR COLORER SÉLECTIVEMENT DES SUBSTRATS BIOLOGIQUES
申请人:ALFA INSTR S R L
公开号:WO2019068935A1
公开(公告)日:2019-04-11
The present invention relates to dye molecules and to staining compositions comprising said dye molecules that are particularly suitable for selectively staining biological substrates, such as structures in the posterior eye segment and proteins. Said dye molecules may be used in ophthalmic surgery to help the surgeon to visualize structures in the posterior eye structures as well as in protein assays to determine one or more analytical parameter of a protein. The dye molecules have the following structure (I) wherein X represents an organic or inorganic cation; and R1 represents a substituted or unsubstituted benzyl group. The present invention relates also to a new method for synthetizing dye molecules.
Design and synthesis of novel rofecoxib analogs as potential cyclooxygenase (COX-2) inhibitors: Replacement of the methylsulfonyl pharmacophore by a sulfonylazide bioisostere
作者:Md. Jashim Uddin、P. N. Praveen Rao、Edward E. Knaus
DOI:10.1002/jhet.5570400518
日期:2003.9
phenyl ring, and 4-(1-oxido-4-pyridyl)-3-phenyl-2(5H)furanone (12) were designed and synthesized for evaluation as selective cyclooxygenase-2 (COX-2) inhibitors. In vitro COX-1/COX-2 enzyme inhibition studies showed that 3-phenyl-4-(4-sulfonylazidophenyl)-2(5H)furanone (7d) inhibited COX-1 selectively (COX-1 IC50 = 0.6659 μM; COX-2 IC50 > 100 μM) and 3-(4-fluorophenyl)-4-(4-sulfonylazidophenyl)-2(5H)furanone
Construction of α-Acyloxy Ketones via Photoredox-Catalyzed O–H Insertion of Sulfoxonium Ylides with Carboxylic Acids
作者:Qing Sun、Yuzhu Peng、Yujing Wang、Xiaoguang Bao
DOI:10.1021/acs.orglett.3c02221
日期:2023.9.15
sulfoxonium ylides with carboxylic acids was advanced under mild and simple conditions, offering a practical approach for preparing α-acyloxy ketones with a broad scope of carboxylic acids. A combined experimental and computational study suggests that this reaction proceeds via a stepwise proton-assisted electron transfer mechanism.