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This paper describes a procedure for direct conversion of aldehydes to nitriles using O-(diphenylphosphinyl)hydroxylamine (DPPH). Aldehydes are smoothly transformed to their corresponding nitriles by heating with DPPH in toluene. The reaction can be accomplished in the presence of alcohol, ketone, ester, or amine functionality.
We describe preparation and use of the quaternary ammonium-based α-iodoacetamide QDE and its isotopologue *QDE as reagents for chemoselective derivatization of cellular thiols. Direct addition of the reagents to live cells followed by adduct extraction into n-butanol and analysis by FT-ICR-MS provided a registry of matched isotope peaks from which molecular… (More)
Our aim was to assess the incidence and clinical characteristics of carotid sinus hypersensitivity in a group of subjects suffering from syncope. The total number of patients was 118. Twenty-four of them (20%) were diagnosed as epileptics (first attack) and 38 (32%) as vasodepressors. 56 patients with unexplained syncope underwent carotid sinus massage… (More)