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New antioxidant hydroquinone derivatives from the algicolous marine fungus Acremonium sp.
A marine fungal isolate, identified as Acremonium sp., was mass cultivated and found to produce two novel hydroquinone derivatives, 7-isopropenylbicyclo[4.2.0]octa-1,3,5-triene-2,5-diol (1) and
Structure of vancomycin and its complex with acetyl-D-alanyl-D-alanine
The structure of vancomycin was determined by X-ray analysis of the degradation product CDP-I and a model of the complex is proposed based on this study and spectroscopic data.
Secondary Interactions in Bromomethyl-substituted Benzenes: Crystal Structures of Three α,α′-Bis-bromoxylenes, 1,2,3,5-Tetrakis(bromomethyl)benzene, and 1,2,4,5-Tetrakis(bromomethyl)benzene
Abstract X-Ray structure determinations of all three isomers of bis(bromomethyl)benzene and of two isomeric tetrakis(bromomethyl)benzenes show that the packing of the molecules is determined
Linear relationship between bond length and reactivity
The two C–O bond lengths of the acetal group in a series of compounds derived from 2-phenoxytetrahydropyran vary with the aryloxy leaving group, and are linearly related to the free energy of
Hydrogen bonding and halogen–halogen interactions in 4-halopyridinium halides
The solid state structures of the 4-halopyridinium halides 4-XC5H4NH+X- (X=Cl, Br, I) all display chains of the form [···X–C5H4N–H+···X-···X–C5H4N–H+···X-···] involving N–H···X- hydrogen bonds and
Stereospecific Reactions of Donor-Acceptor Cyclopropanes with Thioketones: Access to Highly Substituted Tetrahydrothiophenes.
Highly substituted tetrahydrothiophenes with two adjacent quaternary carbon atoms were obtained in a stereospecific manner under mild conditions and in high yield when using AlCl3 as Lewis acid.