Attachment of a 5-nitrofuroyl moiety to spirocyclic piperidines produces non-toxic nitrofurans that are efficacious in vitro against multidrug-resistant Mycobacterium tuberculosis
belonging to the nitrofuran class of antimicrobials has been developed via conjugation of the nitrofuran moiety to a series of spirocyclic piperidines through an amide linkage. It proved to have comparable activityagainst drug-sensitive (H37Rv) strain as well as multidrug-resistant, patient-derived strains of Mycobacteriumtuberculosis. The compound is druglike, showed no appreciable cytotoxicity toward
Multicomponent Reactions: Synthesis of Spirocyclic Tetrahydropyran Derivatives by Prins Cyclization
作者:Arun K. Ghosh、Dongwoo Shin、Gary Schiltz
DOI:10.3987/com-02-s(m)63
日期:——
Substituted spirocyclic tetrahydropyranyl mesylates and tosylates have been synthesized in good yields using a Prins-type cyclization of various cyclic ketones, a homoallylic alcohol and either methanesulfonic or p-toluenesulfonic acid under non-aqueous conditions. The mesylates thus produced could then be transformed into the corresponding Boc-protected amines using an efficient two step procedure
as a basis for the design of potential inhibitors of solubleepoxidehydrolase (sEH). Synthesis and testing of the initial SAR-probing library followed by biochemical testing against sEH allowed nominating a racemic lead compound (±)-22. The latter showed remarkable (> 0.5 mM) solubility in aqueous phosphate buffer solution, unusually low (for sEH inhibitors) lipophilicity as confirmed by experimentally
A convenient Prins cyclization of various azacycloalkanones with homoallylic alcohol was achieved in aqueoussulfuricacid. The formal four-center, three-component reaction provides a facile and flexible entry into a range of spirocyclic amino alcohols which are valuable, ‘high-Fsp3’ motifs for drug design.