4-Imidazole derivatives of benzyl and restricted benzyl sulfonamides, sulfamides, ureas, carbamates, and amides and their use
申请人:——
公开号:US20030073850A1
公开(公告)日:2003-04-17
Compounds of formula I
1
are useful in treating diseases prevented by or ameliorated with &agr;
1A
agonists. Also disclosed are &agr;
1A
agonist compositions and a method of activating &agr;
1
adrenoceptors in a mammal.
By employing triethylamine as a catalyst, [3 + 2] coupling‐eliminationcascade of α,α‐dicyanoolefins with quinonemonoimines was realized. The reactions afforded various novelpterocarpenanalogues with generally moderate yields (up to 75%). In addition, a plausible reaction mechanism was proposed.
An asymmetrichydrogenation of aroylacrylic acidscatalyzed by RuPHOX-Ru catalyst has been developed, affording the corresponding chiral γ-lactones in high yields and with up to 93% ee. The methodology has the advantage of utilizing easily accessible substrates and has therefore expand the scope of the resulting chiral γ-lactones. Furthermore, high catalytic efficiency was achieved in that the reduction