作者:Jean Bowler、Timothy J. Lilley、John D. Pittam、Alan E. Wakeling
DOI:10.1016/0039-128x(89)90076-7
日期:1989.7
A series of steroidal estrogen antagonists with no intrinsic estrogenicity in rat uterotrophic-antiuterotrophic tests has been discovered. The compounds are derivatives of estradiol containing amidoalkyl side chains at the 7 alpha-position. The most potent compounds are N-n-butyl-N-methyl-11-(3,17 beta-dihydroxyestra- 1,3,5(10)-trien-7 alpha-yl) undecanamide and N-2,2,3,3,4,4,4-heptafluorobutyl-N-methyl-11-(3
Intramolecular hydroalkoxylation catalyzed inside a self-assembled cavity of an enzyme-like host structure
作者:L. Catti、K. Tiefenbacher
DOI:10.1039/c4cc08211g
日期:——
Self-assembled resorcin[4]arene hexamer catalyzes the intramolecular hydroalkoxylation of unsaturated alcohols to the corresponding cyclic ethers under mild conditions.
Synthesis of Cyclopropane Fatty Acids by C(<i>sp</i><sup>3</sup>)−C(<i>sp</i><sup>3</sup>) Cross-Coupling Reaction and Formal Synthesis of α-Mycolic Acid
manipulations that are often employed in conventional synthetic routes. This method could be applicable to the synthesis of trans‐cyclopropane fatty acids and enantioenriched cyclopropane fatty acids. Formal synthesis of α‐mycolic acid was achieved by the C(sp3)−C(sp3) cross‐coupling reaction of cyclopropane‐containing bifunctional building blocks.
secondary benzylic alcohols via tandem Ni-catalyzed cross-coupling reactions of aromatic 2-pyridyl esters with alkyl zinc reagents and carbonyl group reduction by Ni–H species is achieved. Preliminary mechanistic studies reveal that the Ni–H species is generated in situ via β-hydride elimination of the Negishi reagents. The reaction is catalyzed by bench-stable nickel salts under mild conditions with
New 5-hydroxy-2-furanone compounds having anti-inflammatory, immunosuppressive and anti-proliferative activity and are useful in treating psoriasis and modifying calcium homeostasis.