self-sufficient transimination reaction between various types of C=N bonds in organic solvents, with turnover frequencies up to 3600 h(-)(1) and rate accelerations up to 6 x 10(5). The mechanism of the crossover reaction in mixtures of amines and imines is studied, comparing parallel individual reactions with coupled equilibria. The intrinsic kinetic parameters for isolated reactions cannot simply be added
Sc(OTf)(3) 有效地催化有机溶剂中各种类型的 C=N 键之间的自给转移反应,转换频率高达 3600 h(-)(1),速率加速高达 6 x 10(5 )。研究了胺和亚胺混合物中交叉反应的机理,比较了平行的单独反应与耦合平衡。当几种组分混合时,孤立反应的内在动力学参数不能简单地相加,并且系统的行为与构成竞争反应网络核心的独特介质的存在一致。在混合系统中,每个胺或亚胺根据它们对催化剂金属离子中心的结合亲和力竞争同一个中心枢纽。更普遍,
Electroreductive intermolecular coupling of ketones with O-methyl oximes. A convenient route to synthesis of 2-amino alcohols
作者:Tatsuya Shono、Naoki Kise、Taku Fujimoto
DOI:10.1016/s0040-4039(00)79486-x
日期:1991.1
The electroreduction of ketones together with O-methyl oximes gave intermolecularly coupled products, 2-methoxyamino alcohols, which were easily reduced to 2-amino alcohols.
SnCl4-mediated reaction of ozonides with allyltrimethylsilane: formation of 1,2-dioxolanes
作者:Patrick H. Dussault、Xuejun Liu
DOI:10.1016/s0040-4039(99)01399-4
日期:1999.9
SnCl4-mediated reaction of ozonides (1,2,4-trioxolanes) with allyltrimethylsilane furnishes trimethylsilylmethyl-1,2-dioxolanes via metalated carbonyl oxides. The carbonyl oxides can arise through initial ionization of either the ether or peroxide oxygens.
Selectivity in Lewis acid-mediated fragmentations of peroxides and ozonides: application to the synthesis of alkenes, homoallyl ethers, and 1,2-dioxolanes †
作者:Patrick H. Dussault、Hyung-Jae Lee、Xuejun Liu
DOI:10.1039/b001391i
日期:——
Fragmentation of dialkyl peroxides and ozonides is strongly influenced by the choice of Lewis acid. TiCl4 promotes C–O ionization (SN1 reaction) of tertiary peroxides while SnCl4 and BF3·OEt2 promote O–O heterolysis (Hock reaction). The cationic intermediates are trapped with allyltrimethylsilane to afford allylated alkanes and homoallyl ethers. In the absence of a nucleophile, ozonides (1,2,4-trioxolanes) invariably undergo O–O heterolysis. However, the combination of allyltrimethylsilane and SnCl4 results in formation of 1,2-dioxolanes via trapping of intermediates derived from SN1 ionization.
Dual molecules containing peroxy derivative, the synthesis and therapeutic applications thereof
申请人:Cazelles Jerome
公开号:US20070021423A1
公开(公告)日:2007-01-25
The invention relates to dual molecule compounds containing a peroxide derivative, to processes for the synthesis of such compounds, to pharmaceutical compositions comprising such compounds, and to methods of treatment and prevention of malaria comprising administering such compounds and such pharmaceutical compositions.