Cyclic guanidines, compositions containing such compounds and methods of use
申请人:Parmee R. Emma
公开号:US20070105930A1
公开(公告)日:2007-05-10
The present invention relates to cyclic guanidines, compositions containing such compounds and methods of treatment. The compounds are glucagon receptor antagonists and thus are useful for treating, preventing or delaying the onset of type 2 diabetes mellitus.
Hypervalent Iodine-Mediated Fluorination of Styrene Derivatives: Stoichiometric and Catalytic Transformation to 2,2-Difluoroethylarenes
作者:Tsugio Kitamura、Kensuke Muta、Juzo Oyamada
DOI:10.1021/acs.joc.5b01929
日期:2015.11.6
Fluorination of styrene derivatives with a reagent system composed of mu-oxo-bis[trifluoroacetato(phenyl)iodine] and a pyridine.HF complex gave the corresponding (2,2-difluoroethyl)arenes in good yields. Similarly, the reagent of PhI(OCOCF3)(2) and the pyridine.HF complex acted as a fluorinating agent for styrene derivatives. The fluorination of styrene derivatives with the pyridine. HF complex underwent under catalytic conditions using 4-iodotoluene as a catalyst and m-CPBA as a terminal oxidant.