Synthesis of 2-Aryl-2,3,3,3-tetrafluoropropanoic Acids, Tetrafluorinated Fenoprofen and Ketoprofen by Electrochemical Carboxylation of Pentafluoroethylarenes
摘要:
Synthesis of 2,3,3,3-tetrafluoro-2-(3-phenoxyphenyl)propanoic acid and 2-(3-benzoylphenyl)-2,3,3,3-tetrafluoropropanoic acid (tetrafluorinated fenoprofen and ketoprofen) was achieved by electrochemical carboxylation of pentafluoroethylarenes.
Use of a Robust Dehydrogenase from an Archael Hyperthermophile in Asymmetric Catalysis−Dynamic Reductive Kinetic Resolution Entry into (<i>S</i>)-Profens
作者:Jacob A. Friest、Yukari Maezato、Sylvain Broussy、Paul Blum、David B. Berkowitz
DOI:10.1021/ja910778p
日期:2010.5.5
application of a dehydrogenase from this Sulfolobus hyperthermophile to asymmetric synthesis and the first example of a DYRKR with such an enzyme. The requisite aldehydes are generated by Buchwald−Hartwig-type Pd(0)-mediated α-arylation of tert-butyl propionate. This is followed by reduction to the aldehyde in one [lithium diisobutyl tert-butoxyaluminum hydride (LDBBA)] or two steps [LAH/Dess−Martin
Synthesis of Farnesol Analogues through Cu(I)-Mediated Displacements of Allylic THP Ethers by Grignard Reagents
作者:Mark F. Mechelke、David F. Wiemer
DOI:10.1021/jo990161p
日期:1999.6.1
The synthesis of a family of farnesol analogues, incorporating aromatic rings, has been achieved in high yields through the development of a regioselective coupling of allylic tetrahydropyranyl ethers with organometallic reagents. The allylic THP group is displaced readily by Grignardreagents in the presence of Cu(I) halides but is stable in the absence of added copper. Thus, an allylic THP group