acid-catalyzed [3+1+1] cycloaddition reaction between aliphatic isocyanides and azomethineylides generated in situ from aziridines, leading to pyrrolidine derivatives, has been developed. This reaction proceeds smoothly under mild conditions and can also be modified by employing aromatic isocyanides to generate four-membered heterocycles, azetidines, through a [3+1] cycloaddition reaction.
A free radical chain mechanism for the isonitrile - nitrile rearrangement in solution and its inhibition.
作者:Michael Meier、Christoph Rüchardt
DOI:10.1016/s0040-4039(00)86223-1
日期:1983.1
A large fraction of the isonitrile-nitrile rearrangement of t-alkyl isonitriles in solution follows a freeradical chain mechanism of the addition-elimination type.
叔烷基异腈在溶液中的大部分异腈-腈重排遵循加成消除型自由基链机理。
Direct synthesis of anomeric tetrazolyl iminosugars from sugar-derived lactams
作者:Michał Mateusz Więcław、Bartłomiej Furman
DOI:10.3762/bjoc.17.12
日期:——
Herein we present the direct asymmetric synthesis of tetrazole-functionalized 1-deoxynojirimycin derivatives from simple sugars via a Schwartz’s reagent-mediated reductive amide functionalization followed by a variant of the Ugi–azide multicomponent reaction. The anomeric configurations of two products were unambiguously confirmed by X-ray analysis. This work also describes examples of interesting
Process for the hemihydrogenation of dinitriles to form aminonitriles
申请人:——
公开号:US20040204603A1
公开(公告)日:2004-10-14
The invention relates to the hemihydrogenation of dinitriles to form corresponding aminonitriles. The invention more particularly relates to a method for the hemihydrogenation of dinitriles in the presence of water and selectifying agents enabling aminonitrile selectivity to be improved.
Mixture containing 1, 3-Butadiene and process for producing the same
申请人:Kuraray Co., Ltd.
公开号:EP1795578A2
公开(公告)日:2007-06-13
To provide a C4 fraction that contains significantly reduced amounts of butynes and methylallene and to provide a process for low-cost and effective production of ethers in which the C4 fraction is used as the starting material for a telomerization process.
A mixture containing 25 to 80 mass% 1,3-butadiene, 13 to 68 mass% butenes and 2 to 15 mass% butanes with butynes and methylallene being contained in amounts of 50 ppm or less and 5 to 800 ppm, respectively