All possible stereoisomeric alcohols (6-benzyl-8-(4-methoxybenzyl)-6, 8-diazabicyclo [3.2. 2] nonan-2-ol) and methyl ethers (6-benzyl-2-methoxy-8-(4-methoxybenzyl)-6, 8-diazabicyclo [3.2. 2] nonane) are prepared from (R)-and (S)-glutamate. A Dieckmann analogous