Auto-protonation diastereoselective d' enolates issus de l'addition-1,4 d'nethiolates avec des enones
作者:Sald Berrada、Stéphane Desert、Patrick Metzner
DOI:10.1016/s0040-4020(01)85987-1
日期:1988.1
steps : Michaeladdition gives an elusive enolate which undergoes a fast “auto-protonation” : transfer of the hydrogen alpha to the thiocarbonyl group towards the enolate moiety. Geometry of the enethiolate double bond is unique and probably cis. An intramolecular concerted auto-protonation mechanism is discussed and a pseudo-cyclic transition state is tentatively assigned. An example of a tandem Michael
PROTOTYPE SYSTEMS OF THERANOSTIC BIOMARKERS FOR IN VIVO MOLECULAR MANAGEMENT OF CANCER
申请人:ODYSSEOS Andreani
公开号:US20160376298A1
公开(公告)日:2016-12-29
The present invention relates to a theranostic system comprising a beacon and a compound selected from the group consisting of a quinazoline-based tyrosine kinase inhibitor and a natural product. The theranostic systems have use in the therapy and diagnosis of tyrosine kinase related malignancies.
Diastereoselective auto-protonation of enolates anti-houk selectivity
作者:Said Berrada、Patrick Metzner
DOI:10.1016/s0040-4039(00)95741-1
日期:1987.1
1,4-Addition reaction of lithiated methyl dithioacetate with α,β-disubstituted enones affords 5-oxodithioesters. The diastereoselectivity ranges from moderate to high (> 95:5) in favour of the syn isomer. This anti-Houk selectivity arises from an ‘auto-protonation’, involving transfer of the hydrogen α to the thiocarbonyl group towards the enolate moiety. A pseudo-cyclic transition state leading to
Broad spectrum beta-lactamase inhibitors. Certain inhibitors also exhibit potent antibiotic activity in addition to beta-lactamase inhibition. Compounds of the invention are designed such that on cleavage of the beta-lactam ring reactive moieties are generated which can inactivate beta-lactamase. Also provided are methods of making beta-lactamase inhibitors and beta-lactam antibiotics exhibiting such inhibition. Additionally provided are pharmaceutical compositions for treatment or prevention of bacterial infections and methods of treatment of such infections.