据报道,采用4-二甲基氨基吡啶(DMAP)催化剂和温和的反应条件(Li 2 CO 3,二甲基乙酰胺和室温)通过吡啶鎓叶立德从苄基卤化物和亚硝基芳烃制备硝酮的一步法。该反应高产率地提供了酮-和醛基酮,并广泛用于苄基卤化物和亚硝基芳烃。在相同的反应系统中,2-甲基-2-亚硝基丙烷,其不具有的芳基,也得到相应的Ñ -叔来自具有吸电子基团的伯苄基溴化物中的-丁基硝酮。作为反应的应用,通过顺序一锅合成,使用2-溴-2-苯基乙酸甲酯制备相应的异恶唑烷。
COMPOSITIONS AND METHODS OF INHIBITING RETINAL DEGENERATION
申请人:Anderson Robert E.
公开号:US20130225694A1
公开(公告)日:2013-08-29
Nitrone-based compositions are disclosed that may be utilized for the prevention and treatment of a variety of ophthalmic diseases or conditions where RPE65 protein isomerohydrolase is implicated. Methods of production and use of said nitrone-based compositions, as well as pharmaceutical and ophthalmic compositions containing same, are disclosed.
Synthesis and characterization of phenyl-substituted C-phenyl-N-tert-butylnitrones and some of their radical adducts
作者:Randall D. Hinton、Edward G. Janzen
DOI:10.1021/jo00035a020
日期:1992.4
Synthesis of C-phenyl-N-tert-butylnitrone (PBN) and several of its analogues with substituents in the 2-, 3-, or 4-position on the phenyl ring is described. While a one-pot reduction/condensation method proved suitable for most compounds, it was necessary to prepare some examples by direct condensation or through oxidation of the appropriate imine. The H-1 NMR data for the 3-X- and 4-X-PBN's can be correlated with the Hammett equation. For the 3-X series DELTA-delta for the alpha-proton correlates best with sigma(+) and has a correlation coefficient of 0.90. For the 4-X series a dual substituent parameter equation using sigma(R)0 gives the best correlation with r = 0.99. The hyperfine splitting constants (hfsc's) of the HO. and HOO. adducts of several substituted PBN's are also included and their correlation with the Hammett equation is discussed.