Diazabicyclo[2.2.1]heptane intermediates are prepared from 4-hydroxy-L-proline in a five step procedure, or from allo-4-hydroxy-D-proline, through a novel 2-(C.sub.1 -C.sub.6)alkyl-5-substituted-2,5-diazabicyclo[2.2.1]heptane intermediate. The diazabicycloheptanes are of use in the preparation of antibiotic quinolones.
Preparation of 2,5-diazabicyclo[2.2.1]heptanes and intermediates
申请人:——
公开号:US05036153A1
公开(公告)日:1991-07-30
(R,R)-2,5-Diazabicyclo[ 2.2.1]heptanes are prepared from a compound of the formula ##STR1## wherein X and R.sub.2 are as defined herein, by heating with tosylchloride in pyridine, reacting the formed compound of the formula ##STR2## with a C.sub.1 -C.sub.6 alkylamine or ammonia, and reducing or hydrolyzing the formed compound of the formula ##STR3## wherein R.sub.1 is hydrogen or C.sub.1 -C.sub.6 alkyl.