Synthesis of Fluoren-9-ones via Palladium-Catalyzed Cyclocarbonylation of o-Halobiaryls
摘要:
[GRAPHICS]The synthesis of various substituted fluoren-9-ones has been accomplished by a novel palladium catalyzed cyclocarbonylation of o-halobiaryls. The cyclocarbonylation of 4'-substituted-2-iodobiphenyls produces very high yields of 2-substituted fluoren-9-ones bearing either electron donating or electron-withdrawing substituents. 3'-Substituted 2-iodobiphenyls afford in excellent yields with good regioselectivity 3-substituted fluoren-9-ones. This chemistry has been successfully extended to polycyclic and heterocyclic fluorenones.
Development of a Rhodium(II)-Catalyzed Chemoselective C(sp<sup>3</sup>)H Oxygenation
作者:Yun Lin、Lei Zhu、Yu Lan、Yu Rao
DOI:10.1002/chem.201502140
日期:2015.10.12
We report the first example of RhII‐catalyzed chemoselective double C(sp3)Hoxygenation, which can directly transform various toluene derivatives into highly valuable aromatic aldehydes with great chemoselectivity and practicality. The critical combination of catalyst Rh(OAc)2, oxidant Selectfluor, and solvents of TFA/TFAA promises the successful delivery of the oxidation with satisfactory yields
A cobalt-catalyzed C(sp3)–H oxygenation reaction to furnish aldehyde was herein reported. This transformation demonstrated high chemo-selectivity, and tolerated various methylarenes bearing electron-withdrawing substituents. This reaction provided rapid access to diverse aldehydes form methylarenes. Notably, TFA/TFAA was used for the first time as a mixed solvent in cobalt-catalyzed oxygenation of
Synthesis of Fluoren-9-ones by the Palladium-Catalyzed Cyclocarbonylation of <i>o</i>-Halobiaryls
作者:Marino A. Campo、Richard C. Larock
DOI:10.1021/jo020140m
日期:2002.8.1
The synthesis of various substituted fluoren-9-ones has been accomplished by the palladium-catalyzed cyclocarbonylation of o-halobiaryls. The cyclocarbonylation of 4'-substituted 2-iodobiphenyls produces very high yields of 2-substituted fluoren-9-ones bearing either electron-donating or electron-withdrawing substituents. 3'-Substituted 2-iodobiphenyls afford 3-substituted fluoren-9-ones in excellent
[EN] BENZ-1,3-AZOLE DERIVATIVES AND THEIR USES AS HEPARANASE INHIBITORS<br/>[FR] DERIVES DE BENZ-1,3-AZOLE ET LEURS UTILISATIONS EN TANT QU'INHIBITEURS DE L'HEPARANASE
申请人:INSIGHT STRATEGY AND MARKETING
公开号:WO2002060374A2
公开(公告)日:2002-08-08
The invention provides benz-1,3-azole derivatives, namely benzimidazole, benzoxazole and benzthiazole derivatives as heparanase inhibitors suitable for treatment of diseases and disorders caused by or associated with heparanase catalytic activity such as cancer, inflammatory disorders and autoimmune diseases.