A two step efficient and practical synthesis of a variety of 4-chromanones is described. Phenols undergo a Michael addition to acrylonitriles in the presence of catalytic amounts of potassium carbonate and tert-butanol to generate the corresponding 3-aryloxypropanenitriles in 50-93% yields. Treatment of the resulting aryloxypropionitriles with 1.5 equiv of TfOH and 5 equiv of TFA, followed by an aqueous work up afforded 4-chromanones in moderate to excellent yields. (C) 2011 Elsevier Ltd. All rights reserved.
Substituted pyrazolyl compounds for the treatment of inflammation
申请人:——
公开号:US20030114432A1
公开(公告)日:2003-06-19
The present invention relates to substituted pyrazolyl derivatives, compositions comprising such, intermediates, methods of making substituted pyrazolyl derivatives, and methods for treating cancer, inflammation, and inflammation-associated disorders, such as arthritis.
A versatile approach to flavones via a one-pot Pd(<scp>ii</scp>)-catalyzed dehydrogenation/oxidative boron-Heck coupling sequence of chromanones
作者:Jun Lee、Jihyun Yu、Seung Hwan Son、Jinyuk Heo、Taelim Kim、Ji-Young An、Kyung-Soo Inn、Nam-Jung Kim
DOI:10.1039/c5ob01911g
日期:——
A variety of flavones were expediently synthesized from readily accessible chromanones via a one-pot sequence involving Pd(ii)-catalyzed dehydrogenation and oxidative boron-Heck coupling with arylboronic acid pinacol esters.
Amidine derivatives and platelet aggregation inhibitor containing the
申请人:Mitsui Toatsu Chemicals, Inc.
公开号:US05719145A1
公开(公告)日:1998-02-17
The invention relates to a substituted amidine derivative which has an excellent platelet aggregation inhibiting action on the basis of fibrinogen antagonism and is particularly excellent in effectiveness on oral administration, and the platelet aggregation inhibitor containing the substituted amidine derivative of the invention as an effective ingredient is effective for prevention and treatment of thrombosis, and restenosis or reocclusion after percutaneous transluminal coronary angioplasty or percutaneous transluminal coronary recanalization.
On the basis of our recently reported aniline aqueous borylation, molecular diversity was achieved in a one-pot process by combining other reactions such as esterification, Suzuki-Miyaura coupling, hydrogenolysis, or Petasis borono-Mannich.
Amidine derivatives and platelet aggregation inhibitor containing the same