New Aspects of Catalytic Intramolecular C−H Amination: Unexpected Formation of a Seven-Membered Ring in Nitrogen-Containing Systems
作者:Sylvestre Toumieux、Philippe Compain、Olivier R. Martin、Mohamed Selkti
DOI:10.1021/ol061649x
日期:2006.9.1
The first example of the formation of a seven-memberedring by way of intramolecular-catalyzed amination of saturated C-H bonds is reported (Du Bois reaction). The influence of various structural parameters was studied, and it was shown that the unexpected regioselectivity observed in nitrogen-containing systems could be rationalized by conformational factors. These results open the way to innovative
The amino-functionalization of tertiary, secondary and benzylic C–H bonds of tethered carbamates and sulfamates by iodosobenzene is catalyzed by CuI-diimine complexes in moderate to good yield. Employing homochiral imine-Cucatalysts affords oxazolidinones and oxathiazinanes with modest enantioselectivity.
Anticonvulsant O-alkyl sulfamates. 2,3:4,5-Bis-O-(1-methylethylidene)-.beta.-D-fructopyranose sulfamate and related compounds
作者:Bruce E. Maryanoff、Samuel O. Nortey、Joseph F. Gardocki、Richard P. Shank、Susanna P. Dodgson
DOI:10.1021/jm00388a023
日期:1987.5
Novel sugar sulfamate 1 (McN-4853, topiramate) has been found to exhibit potent anticonvulsant activity analogous to that of phenytoin. In the maximal electroshock seizure test, orally at 2 h in mice, 1 had an ED50 of 39 mg/kg. Orally, 1 had a duration of action in excess of 8 h. Other aspects of the pharmacology of 1, as well as neurochemistry and carbonic anhydrase inhibition, are discussed. The