Novel Synthesis of (2<i>S</i>, 3<i>R</i>, 4<i>S</i>)-4-Amino-5-cyclohexyl-1-morpholino-2,3-pentanediol and (2<i>S</i>, 3<i>R</i>, 4<i>S</i>)-2-Amino-1-cyclohexyl-6-methyl-3,4-heptanediol, the C-Terminal Components of Renin Inhibitors
The title synthesis could be accomplished in a highly stereo- and regioselective manner by employing epoxide formation with inversion of configuration followed by epoxide opening with a nucleophile.
A dihydroxyethylene isostere, (2S, 3R, 4S)-4-amino-5-cyclohexyl-1-morpholino-2, 3-pentanediol (ACMP, 1), which is a component of non-peptidic, orally active, low-molecular-weight renin inhibitors, was synthesized stereospecifically starting from 3-cyclohexyl-L-alanine via iodo-cyclocarbamation as the key reaction.