Surface-Mediated Reactions. 9. Selective Oxidation of Primary and Secondary Amines to Hydroxylamines<sup>1</sup>
作者:John D. Fields、Paul J. Kropp
DOI:10.1021/jo0002083
日期:2000.9.1
OXONE over silica gel or, in some cases, alumina has been found to oxidize the primary and secondaryamines 3 selectively to the corresponding hydroxylamines 4, in either the presence or absence of a solvent. Treatment of Boc-protected L-lysine (6) under the latter conditions afforded hydroxylamine 7 in excellent yield. The trialkylamine 1a and pyridine (1b), in which selectivity is not an issue, were
[EN] NITRATED HYDROCARBONS, DERIVATIVES, AND PROCESSES FOR THEIR MANUFACTURE<br/>[FR] HYDROCARBURES NITRÉS, DÉRIVÉS ET LEURS PROCÉDÉS DE PRODUCTION
申请人:ANGUS CHEMICAL
公开号:WO2009129097A1
公开(公告)日:2009-10-22
Provided is a process for the formation of nitrated compounds by the nitration of hydrocarbon compounds with dilute nitric acid. Also provided are processes for preparing industrially useful downstream derivatives of the nitrated compounds, as well as novel nitrated compounds and derivatives, and methods of using the derivatives in various applications.
Condensation reactions of unprotected tetroses and pentoses with hydroxylamines afforded nitrones, which were easily converted to densely functionalized isoxazolidines in the presence of electron-poor alkenes. The 1,3-dipolarcycloaddition occurred with good facial discrimination of the chiral nitrone but under rather low endo/exo control. Stereochemistry of isomers was ascertained by chemical correlation
This application discloses novel cyanoguanidines of the formula (I) wherein A is selected from -C(=O)-, -S(=O)2-, -C(=S)-, and -P(=O)(R5)-, wherein R5 is selected from C1-6-alkyl, C1-6-alkoxy, and hydroxy; B is selected from a single bond, -O-, -NR6- and -C(=O)-NR6-, wherein R6 is selected from hydrogen, optionally substituted C1-12-alkyl, optionally substituted C1-12-alkenyl, optionally substituted aryl, optionally substituted heterocyclyl, and optionally substituted heteroaryl; and m is an integer of 0-12 and n is an integer of 0-12, wherein the sum m+n is 1-20; and R1 is selected from optionally substituted heteroaryl; and pharmaceutically acceptable salts thereof, and prodrugs thereof. The compounds are usefuld for use as a medicament for the treatment of a disease or a condition caused by an elevated level of nicotinamide phosphoribosyltransferase (NAMPRT).
The invention provides pharmaceutical compositions comprising primary N-hydroxylamines and related therapeutic, prophylactic, diagnostic and screening methods. The pharmaceutical compositions generally comprise a pharmaceutical composition comprising an orally administrable effective unit solid dosage of a primary N-hydroxylamine or a pharmaceutically acceptable salt thereof and substantially free of a nitrone corresponding to the hydroxylamine.