Distant Functionalization via Incorporation of Thiophene Moieties in Electrophilic Reactions Promoted by Samarium Diiodide
摘要:
[GRAPHICS]Methyl thiophene-2-carboxylate, methyl 3-(thien-2-yl)acrylate, and methyl 5,2'-bithiophene-2-carboxylate were utilized as the synthetic equivalents of pentanoate 5-anion, pentanoate 4,5-dianion, heptanoate 7-anion, and nonanoate-8,9-dianion. By the promotion of samarium diiodide, these thiophene incorporating compounds reacted with aldehydes, ketones, and conjugated esters regioselectively at the thienyl rings, Long-chain esters with remote hydroxyl and carboxyl groups, including an antiarthritis agent, a shellac component, and an inhibitory agent of spore germination, were prepared after reductive desulfurizatian on Raney nickel.
[EN] DRUG CONJUGATES<br/>[FR] CONJUGUÉS DE MÉDICAMENT
申请人:UNIV MISSOURI
公开号:WO2009158633A1
公开(公告)日:2009-12-30
Conjugated compounds comprising a therapeutic or diagnostic agent linked to a substrate for a cell membrane transporter or receptor by lipophilic linker are provided.
提供了包含治疗或诊断药物与细胞膜转运体或受体的底物通过亲脂性连接剂连接的共轭化合物。
Absolute Configurations of Some Hydroxy-fatty Acids Produced by the Insect Genus <i>Laccifer</i>
The absoluteconfigurations of some hydroxy-fatty acids were examined by the modified Mosher's method proposed by Ohtani et al. The absoluteconfigurations of the major components were determined from NMR data of their ΜΤΡΑ esters and 2-ΝΜΑ esters. The application of Mosher's method for the anti-glycol is discussed.