Process of using anti-inflammatory furanones as selective calcium
申请人:Allergan, Inc.
公开号:US05376676A1
公开(公告)日:1994-12-27
4-(C.sub.10 -C.sub.20)alkyl-2(5H)-furanone compounds are selective calcium channel inhibitors and useful for treatment of diseases such as hypertension, angina, cardiac arrythmia, pulmonary hypertension, aortic insufficiency, Raynand's disease, migraine headaches, deficiency of platelet function, atherosclerosis, ischemia, reprofusion injury, bronchial asthma, esophageal spasm, dysmenorhea, allergic contact dermatitis, acute inflammatory response, glaucoma and as potentiators of chemotherapeutic agents in the treatment of tumors.
Synthesis of 4-alkyl-3-bromo-2(5H)-furanones and unsymmetrically disubstituted 3,4-dialkyl-2(5H)-furanones by palladium-catalyzed cross-coupling reactions
作者:Fabio Bellina、Chiara Anselmi、Renzo Rossi
DOI:10.1016/s0040-4039(01)00609-8
日期:2001.6
4-dibromo-2(5H)-furanone undergoes a regioselective cross-coupling reaction with alkylboronic acids in the presence of catalytic amounts of PdCl2(MeCN)2 and AsPh3 and a large molar excess of Ag2O to provide the corresponding 4-alkyl-3-bromo-2(5H)-furanones in satisfactory yields. These monobromo derivatives have proven to be useful precursors to unsymmetrically substituted 3,4-dialkyl-2(5H)-furanones which