Novel pteridines of formula (I), ##SPC1## wherein R is a lower alkyl group, optionally substituted with a hydroxy group and R.sup.1 and R.sup.2 are the same or different and each is a lower alkyl group having together at least 3 carbon atoms or R.sup.1 and R.sup.2, together with the carbon atom in the pteridine ring structure, form a spirocycloalkyl ring system having 4 to 6 carbon atoms outside the pteridine ring structure, and their method of preparation. The above compounds have bacteriostatic activity.
[EN] HETEROBICYCLIC COMPOUNDS AS BETA-LACTAMASE INHIBITORS<br/>[FR] COMPOSÉS HÉTÉROBICYCLIQUES COMME INHIBITEURS DE LA BÊTA-LACTAMASE
申请人:ASTRAZENECA AB
公开号:WO2013150296A1
公开(公告)日:2013-10-10
The present invention is directed to compounds which are beta-lactamase inhibitors. The compounds and their pharmaceutically acceptable salts, are useful in combination with beta-lactam antibiotics, or alone, for the treatment of bacterial infections, including infections caused by drug resistant organisms, including multi-drug resistant organisms. The present invention includes compounds according to formula (Ia): or a pharmaceutically acceptable salt thereof, wherein the values of R1, R 2, R 3 and R 4 are described herein.
Moureu; Barrett, Bulletin de la Societe Chimique de France, 1921, vol. <4> 29, p. 1000
作者:Moureu、Barrett
DOI:——
日期:——
Synthesis of (<i>E</i>)-1-Bromo-3-ethyl-3-pentene
作者:Margaret A. Brimble、Michael K. Edmonds
DOI:10.1080/00397919608003611
日期:1996.1
The synthesis of (E)-1-bromo-3-ethyl-3-pentene 1 is described in which the (E)-stereochemistry of the alkene is set up via a diastereoselective glyoxylate ene reaction.