One-Step Conversion of Alcohols into Nitriles with Simultaneous Two-Carbon Chain Elongation. (Cyanomethyl)trimethylphosphonium Iodide as a Reagent with a Dual Mode of Action
作者:Florencio Zaragoza
DOI:10.1021/jo025731r
日期:2002.7.1
Treatment of alcohols with an excess of (cyanomethyl)trimethylphosphonium iodide leads, after aqueous hydrolysis, to the clean formation of nitriles with two more carbon atoms than present in the original alcohol. Benzylic, allylic, and aliphatic alcohols without beta-branching (RCH(2)CH(2)OH) have been converted to nitriles with success. The required phosphonium iodide is simple to prepare and can
N-Substituent Effects in the Selective Delivery of Polyamine Conjugates into Cells Containing Active Polyamine Transporters
作者:Richard Andrew Gardner、Jean-Guy Delcros、Fanta Konate、Fred Breitbeil、Bénédicte Martin、Michael Sigman、Min Huang、Phanstiel
DOI:10.1021/jm0497040
日期:2004.11.1
N(1)-anthracen-9-ylmethyl, N(1)-2-(anthracen-9-yl)ethyl, N(1)-3-(anthracen-9-yl)propyl, and pyren-1-ylmethyl. The polyamine architecture was also altered and ranged from diamine to triamine and tetraamine systems. Biological activities in L1210 (murine leukemia), Chinese hamster ovary (CHO), and CHO's polyamine transport-deficient mutant (CHO-MG) cell lines were investigated via IC(50) cytotoxicity determinations
Adenine-Thymine Base Pair Recognition by an Anthryl Probe from the DNA Minor Groove
作者:Challa V. Kumar、Emma H.A. Punzalan、Willy B. Tan
DOI:10.1016/s0040-4020(00)00526-3
日期:2000.9
spectra of the probe-DNA complexes. The probes are achiral and binding to the helix leads to induced CD spectra in the 300–400 nm region, away from the DNA absorption bands. The positive CD bands observed indicate intercalation of the anthryl chromophore with its longaxis perpendicular to the base-pair dyad axis. Fluorescence polarization data clearly support intercalation of both probes into the above
Organic semiconductor materials and precursors thereof
申请人:Facchetti Antonio
公开号:US20080249309A1
公开(公告)日:2008-10-09
The present teachings provide novel organic semiconductor compounds and their soluble precursors, methods for preparing these compounds and precursors, as well as compositions, materials, articles, structures, and devices that incorporate such compounds.
Zeolites as equilibrium-shifting agents in shuttle catalysis
作者:Jesse Dallenes、Jonas Wuyts、Niels Van Velthoven、Andraž Krajnc、Gregor Mali、Oleg A. Usoltsev、Aram L. Bugaev、Dirk De Vos
DOI:10.1038/s41929-023-00967-8
日期:——
we show an approach that harnesses the shape-selective and catalytic properties of zeolites to drive the shuttling equilibrium of transfer hydrocyanation and transfer hydroformylationreactions to near-completion. The zeolites irreversibly convert the transfer reaction co-products in an exergonic tandem reaction while excluding the substrates via pore size restrictions. Through fine-tuning of the zeolite’s