54 research outputs found
Asenjonamides AâC, antibacterial metabolites isolated from Streptomyces asenjonii strain KNN 42.f from an extreme-hyper arid Atacama Desert soil
Bio-guided fractionation of the culture broth extract of Streptomyces asenjonii strain KNN 42.f recovered from an extreme hyper-arid Atacama Desert soil in northern Chile led to the isolation of three new bioactive ?-diketones; asenjonamides AâC (1â3) in addition to the known N-(2-(1H-indol-3-yl)-2-oxoethyl)acetamide (4), a series of bioactive acylated 4-aminoheptosyl-?-N-glycosides; spicamycins AâE (5â9), and seven known diketopiperazines (10â16). All isolated compounds were characterized by HRESIMS and NMR analyses and tested for their antibacterial effect against a panel of bacteria
Ferrocenylimidazoline palladacycles as efficient catalysts for the aza-Claisen rearrangement reaction of allylic imidates
Enantioselective, Organocatalyzed, Intramolecular Aldol Lactonizations with Keto Acids Leading to Bi- and Tricyclic ÎČ-Lactones and Topology-Morphing Transformations
Enantioselective, Organocatalyzed, Intramolecular Aldol Lactonizations with Keto Acids Leading to Bi- and Tricyclic ÎČ-Lactones and Topology-Morphing Transformations
Synthesis of Substituted Furans through Domino Aldol/Homo-Michael Reactions of Formylcyclopropane 1,1-Diesters with 1,3-Dicarbonyls
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