Synthesis of 1-amino-[1,2,3]oxadiazolo[4,3-α]phthalazin-4-ium chloride and substituted dihydro derivatives. New annelated sydnonimines
作者:J. M. Ruxer、J. Mauger、D. Bénard、C. Lachoux
DOI:10.1002/jhet.5570320245
日期:1995.3
cyclisation procedure of the carbonyl chloride Reissert adduct 14 of phthalazine. This synthetic method could be extended to the preparation of dihydroderivatives 7a to 7f and represents a new access to annelated sydnonimines. The para anisoyl and ethoxycarbonyl derivatives of these sydnonimines were also prepared with analogy to molsidomine 1 or pirsidomine 2.
Base-promoted aerobic oxidation of <i>N</i>-alkyl iminium salts derived from isoquinolines and related heterocycles
作者:Li-Gang Bai、Yue Zhou、Xin Zhuang、Liang Zhang、Jian Xue、Xiao-Long Lin、Tian Cai、Qun-Li Luo
DOI:10.1039/c9gc03629f
日期:——
scope, low cost, feasibility of scale up, wide availability of reagents, and green reaction conditions, this method shows great potential for preparing isoquinolones and related compounds. The method was applied for atom- and step-economical total synthesis of natural products such as norketoyobyrine.
Phthalazin-2-ylidenes As Cyclic Amino Aryl Carbene Ligands in Rhodium(I) and Iridium(I) Complexes
作者:Antonio Magriz、Silvia Gómez-Bujedo、Eleuterio Álvarez、Rosario Fernández、José M. Lassaletta
DOI:10.1021/om100723b
日期:2010.11.22
The direct metalation of phthalazinium halides with [Rh(tBuO)(COD)]2 or [Ir(tBuO)(COD)]2 led to the isolation of stable [MCl(phthalazin-2-ylidene)X(COD)] (M = Rh, Ir) as a new family of cyclic amino aryl carbene transition metalcomplexes. The X-ray diffraction analysis of several representatives systematically revealed a relatively short C(aryl)−C(carbene) bond distance of 1.44−1.46 Å, shorter than
and quinolinones has been achieved in water solution by oxidation of isoquinolinium and quinolinium salts using oxygen under mild conditions. This reaction is compatible with numerous isoquinolinium and quinolinium salts. The results of the isotope labeling experiment (using 18O2 and H218O) suggest that OH− is the oxygen source of the forming products, and oxygen serves as the oxidant. Moreover, this
通过在温和条件下使用氧气氧化异喹啉和喹啉盐,已经在水溶液中实现了异喹啉酮和喹啉酮的环境友好合成。该反应与许多异喹啉和喹啉盐相容。同位素标记实验(使用18 O 2和H 2 18 O)的结果表明,OH -是形成产物的氧源,氧作为氧化剂。此外,该方法可用于合成拓扑异构酶I抑制剂等生物活性分子。
Pyridinium Chloride: a New Reagent for N-Demethylation of N-Methylazinium Derivatives.
A new N-demethylation reaction of N-methylazinium derivatives by using boiling pyridinium chloride is described. The reaction is quite clean, fast and yields are almost quantitatives. (C) 1997 Elsevier Science Ltd.