Palladium nanoparticles have been electrochemically supported on zirconium oxide nanostructured powders and all the nanomaterials have been characterized by several analytical techniques. The Pd/ZrO(2) nanocatalyst is demonstrated to be a very efficient catalyst in Heck, Ullmann, and Suzuki reactions of aryl halides in water. The catalyst efficiency is attributed to the stabilization of Pd nano...

Measurements of CH3O2NO2 in the upper troposphere B. A. Nault, C. Garland, S. E. Pusede, P. J. Wooldridge, K. Ullmann, S. R. Hall, and R. C. Cohen Department of Earth and Planetary Science, University of California at Berkeley, Berkeley, CA, USA Department of Chemistry, University of California at Berkeley, Berkeley, CA, USA Atmospheric Chemistry Division, National Center for Atmospheric Resear...

Young, 0. & Beevers, H. ( 1976) I’hy/ochrrnistry 15,379-385 19,525-530 Received 20 July I989 Taton, M., Ullmann, P.. Benveniste. P. & Rahirr. A. (1988) I’estic. Biochern. I’hysiol. 30, 178189 Trzaskos, J. M., Fisher, R. T. & Favata, M. F. (1986) J. Hie/. Chern. 261, 16937-16942 Jefcoate, C. R. ( 1978) in Methods in Enzvrnology (Fleischer. S. & Packer, L.. eds.), vol. 52, pp. 258, Academic Press...

Affi liations of authors: Departments of Microbiology and Immunology, Pediatrics, Obstetrics, Gynecology, and Women’s Health, and Epidemiology and Population Health, Albert Einstein Cancer Center, Albert Einstein College of Medicine, Bronx, NY (RDB); Division of Invertebrate Zoology, American Museum of Natural History, New York, NY (RD). Correspondence to: Robert D. Burk, MD, Albert Einstein Co...

The preparation of (hetero)arylamines has been significantly advanced by developments in transition metal-catalyzed Csp2–N coupling (e.g., Buchwald–Hartwig, Chan–Lam, and Ullmann couplings). As a complement to these strategies, our group recently demonstrated the reductive arylboronic acids nitro compounds, initially nitro(hetero)arenes more nitromethane, an organophosphorus-catalyzed method op...

Let ${ p\_{n}}$ denote the orthonormal polynomials associated with a measure $\mu$ compact support on real line. be regular in sense of Stahl, Totik, and Ullmann, $I$ subinterval which is absolutely continuous, while $\mu'$ positive continuous there. We show that boundedness $% { closely related to spacing zeros $p\_{n}$ $p\_{n-1}$ interval. One ingredient proving “local limits” imply universal...

Under controlled conditions, 6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline-1-carbonitrile can be quantitatively deprotonated in the α-position. Its alkylation directly furnishes 3,4-dihydroisoquinolines which can serve as starting materials for the preparation of various alkaloids. Here, the preparation of the benzylisoquinolines (+)-laudanidine, (+)-armepavine, and (+)-laudanosine as well as th...