화학공학소재연구정보센터
Chemistry Letters, Vol.36, No.11, 1372-1373, 2007
A divergent route to 3-amino-2,3,6-trideoxysugars including branched sugar: Synthesis of vancosamine, daunosamine, saccharosamine, and ristosamine
Four 3-amino-2,3,6-trideoxysugars were synthesized by a divergent route from a single enone 9a. The Migita-Stille coupling introduced a methyl group at the 3-position. Stereoselective reduction of enone and the Mitsunobu reaction provided both beta- and alpha-hydroxy groups at the 4-position. Stereospecific radical cyclization of the C4 carbamoyl moiety furnished the desired 5a, 5b and 6a, 6b, respectively.