Tricyclic dihydropyrazolone and tricyclic dihydroisoxazolone potassium channel openers
申请人:——
公开号:US20020007059A1
公开(公告)日:2002-01-17
Compounds of formula I
1
are useful in treating diseases prevented by or ameliorated with potassium channel openers. Also disclosed are potassium channel opening compositions and a method of opening potassium channels in a mammal.
Palladium-catalysed hydrostannylations of 1-bromoalkynes. A practical synthesis of (E)-1-stannylalk-1-enes
作者:Christopher D. J. Boden、Gerald Pattenden、Tao Ye
DOI:10.1039/p19960002417
日期:——
A practical synthesis of (E)-1-stannylalk-1-enes containing a range of oxygen and nitrogen functionality is highlighted, involving hydrostannylation followed by palladium-catalysed carbon–bromine bond cleavage reactions of 1-bromoalkynes.
Compounds of formula I
1
are useful in treating diseases prevented by or ameliorated with potassium channel openers. Also disclosed are potassium channel opening compositions and a method of opening potassium channels in a mammal.
The palladium-catalyzed desilylation-arylation of substituted vinylsilanes by p-iodoanisole in the presence of bidentate phosphine ligands is described. Apart from enhancing the rate of the reaction considerably, heteroatom-based functional groups in the vinylsilane moiety have a profound influence on the regiochemistry. A catalytic cycle for the chelation-controlled desilylation-arylation reaction