摘要:
A method for preparing trihydroxybutyl analogues of the biologically active compound 2-acetyl-4(5)-(1,2,3,4-tetrahydroxybutyl)imidazole (THI) is reported. This method employs a palladium(0)catalyzed coupling of 1-(ethoxymethyl)-4-iodoimidazole (3a) to functionalized vinylstannane 11, 1-alkynylstannane 16, or alkyne 10 to introduce the C-4 imidazole 4-carbon side chain, The 1,2-dihydroxyfunctionality of the butyl side chain was introduced by a Sharpless catalytic asymmetric dihydroxylation.