[EN] NOVEL PHENYLHETEROAZETIDINES, USEFUL AS NITRIC OXIDE SYNTHASE INHIBITORS<br/>[FR] NOUVELLES PHENYLHETEROAZETIDINES UTILES COMME INHIBITEURS DE LA SYNTHASE D'OXYDE NITRIQUE
申请人:ASTRAZENECA AB
公开号:WO2002012187A1
公开(公告)日:2002-02-14
There are provided novel compounds of formula (I) wherein R?1, R2, R3, R4, R5, R6, R7, R8, R9¿, W, X and Y are as defined in the specification, and pharmaceutically acceptable salts thereof, and enantiomers and racemates thereof; together with processes for their preparation, compositions bontaining them and their use in therapy. The compounds are inhibitors of nitric oxide synthase and are thereby particularly useful in the treatment or prophylaxis of inflammatory disease and pain.
Oxidative Deconstruction of Azetidinols to α-Amino Ketones
作者:Robert-Cristian Raclea、Philipp Natho、Lewis A. T. Allen、Andrew J. P. White、Philip J. Parsons
DOI:10.1021/acs.joc.0c00986
日期:2020.7.17
A silver-mediated synthesis of α-amino ketones via the oxidative deconstruction of azetidinols has been developed using a readily scalable protocol with isolated yields up to 80%. The azetidinols are easily synthesized in one step and can act as protecting groups for these pharmaceutically relevant synthons. Furthermore, mechanistic insights are presented and these data have revealed that the transformation
Herein, we describe an N-heterocycliccarbene (NHC)-catalyzed deconstructive isomerization of azetidinols via an inert C–C bond cleavage. It provides a direct and supplementary pathway to access α-amino ketone and oxazol-2-one derivatives in moderate to good yields. DFT calculation supports the proposed mechanism in which NHC undergoes a concerted proton transfer and ring-opening process. This reaction