Asymmetric Synthesis of Adjacent Tri‐ and Tetrasubstituted Carbon Stereocenters: Organocatalytic Aldol Reaction of an Hydantoin Surrogate with Azaarene 2‐Carbaldehydes
作者:June Izquierdo、Noémie Demurget、Aitor Landa、Tore Brinck、Jose M. Mercero、Peter Dinér、Mikel Oiarbide、Claudio Palomo
DOI:10.1002/chem.201902817
日期:2019.9.20
A bifunctional amine/squaramide catalyst promoted direct aldol addition of an hydantoin surrogate to pyridine 2-carbaldehyde N-oxides to afford adducts bearing two vicinal tertiary/quaternary carbons in high diastereo- and enantioselectivity (d.r. up to >20:1; ee up to 98 %) is reported. Acid hydrolysis of adducts followed by reduction of the N-oxide group yields enantiopure carbinol-tethered quaternary
[EN] SERINE REPLACEMENT POLYMYXIN ANALOGUES USEFUL AS ANTIBIOTIC POTENTIATORS<br/>[FR] ANALOGUES DE POLYMYXINE DE REMPLACEMENT DE SÉRINE UTILES EN TANT QUE POTENTIALISATEURS D'ANTIBIOTIQUE
申请人:SPERO OPCO
公开号:WO2017189868A1
公开(公告)日:2017-11-02
The disclosure provides compounds of the formula I or a tautomer thereof, or a pharmaceutically acceptable salt of either of the foregoing. The variables R1 and R2 are defined in the disclosure. The disclosure further includes pharmaceutical compositions comprising a compound of formula I together with at least one pharmaceutically acceptable carrier. The disclosure also includes a method of sensitizing bacteria to an antibacterial agent, comprising administering a therapeutically effective amount of the antibacterial agent and a compound of formula I to a patient infected with the bacteria, simultaneously or sequentially.