To understand the catalytic mechanism of an enzyme, it is crucial to determine the crystallographic structures corresponding to the individual reaction steps. Here, we report two crystal structures of enzyme-substrate complexes prior to reaction initiation: tropinone reductase-II (TR-II)-NADPH and TR-II-NADPH-tropinone
The alpha7 nicotinic acetylcholine receptor (nAChR)-selective partial agonist tropisetron is a conjugate of an indole and a tropane group. We tested compounds structurally related to either the indole or tropane domains of tropisetron on oocytes expressing human alpha7. alpha4beta2, or
Sulfinimine-derived, enantiopure N-sulfinyl beta-amino ketone ketals on hydrolysis give dehydropyrrolidine ketones that on treatment with (Boc)(2)O/DMAP afford substituted tropinones in good yield.
Recent work on the biosynthesis of the tropane moiety of cocaine, hyoscamine, scopolamine, and related alkaloids is reviewed. Revision of the generally accepted biosynthetic pathway to these alkaloids is now proposed in the light of new discoveries. New information on
Enantioselective synthesis of unnatural (S)-(+)-cocaine.
J C Lee et al.
The Journal of organic chemistry, 65(15), 4773-4775 (2000-08-26)
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