Chiron approach towards the synthesis of (2S,3R)-3-hydroxyornithine, (2S,3R)-3-hydroxylysine and tetrahydroazepine core of (−)-balanol

d-Glucose derived synthon 4 was successfully utilized for the synthesis of (2S,3R)-β-hydroxyornithine 1, (2S,3R)-β-hydroxylysine 2 and tetrahydroazepine core of balanol 3.