New 1α,25-Dihydroxy-19-norvitamin D<sub>3</sub> Compounds of High Biological Activity: Synthesis and Biological Evaluation of 2-Hydroxymethyl, 2-Methyl, and 2-Methylene Analogues
作者:Rafal R. Sicinski、Jean M. Prahl、Connie M. Smith、Hector F. DeLuca
DOI:10.1021/jm9802618
日期:1998.11.1
New highly active isomers of the natural hormone 1alpha, 25-dihydroxyvitamin D3 possessing an exomethylene group at the 2-position were prepared in a convergent manner, starting with (-)-quinic acid and the corresponding (20R)- and (20S)-25-hydroxy Grundmann ketones. These 2-methylene-19-norvitamins were efficiently converted to the 2-methyl and 2-hydroxymethyl derivatives, some of which exhibited