环加成反应（cycloaddition reaction）是在光或热的条件下，两个或多个不饱和分子通过双键相互加成生成环状化合物的反应。环加成反应在反应过程中不消除小分子，而且只生成σ-键，而没有σ-键的断裂。Diels-Alder反应就是典型的环加成反应。例如：一切现有的实验证据表明，环加成反应也是一个协同过程。环加...
Tandem [8 + 2] Cycloaddition−[2 + 6 + 2] Dehydrogenation Reactions Involving Imidazo[1,2-a]pyridines and Imidazo[1,2-a]pyrimidines Tandem [8 + 2] cycloaddition-[2 + 6 + 2] dehydrogenation reactions involving imidazo[1,2- a ]pyridines and imidazo[1,2- a ]pyrimidines. Aginagal....
[6+4]以及形式[4+2]等环加成反应,反应的选择性由2-环烯酮的环大小以及三庚烯酮的取代基控制,得到的手性产物可以发生各种不同的化学反应或光化学反应进而合成全碳多环骨架。
Inside epoxide: Bimetallic salalen aluminum complexes catalyze the cycloaddition reaction of CO2with both cyclohexene oxide and propylene oxide to producecis-cyclohexene carbonate and propylene carbonate as the exclusive products with high turnover frequencies. ...
Cycloaddition of chiral [(1R)-10-(N,N-diethylsulfamoyl)isobornyl] 2H-azirine-3-carboxylate to E,E-1,4-diacetoxy-1,3-butadiene shows complete diatereoselect... YB Ruizblanco,MJ Alves,JE Rodríguezborges,... - 《Journal of the Chilean Chemical Society》 被引量: 0发表: 2013年 2-Ali -...
An effective 1,3-dipolar cycloaddition for the synthesis of 1,3,5-trisubstituted 1,2,4-triazole derivatives was developed by reacting oximes with hydrazono... LY Wang,WC Tseng,HY Lin,... - 《Synlett》 被引量: 0发表: 2008年 J. Tie1,2,3,4, I. Kinde5, Y. Wang5, H....
Tandem michael addition-1,3-dipolar cycloaddition reactions. class 2 ... Aldoximes and ketoximes react with a range of bifunctional Michael acceptor-dipolarophile substrates comprising functionalised 1,3-, 1,4- and 1,5-dienes vi... Ronald Grigg a,Michael J. Dorrity b,Frances Heaney b,... ...
Molecular and crystal structure of a double cycloaddition product... Starting from the nickel meso -formyloctaethylporphyrin oxime complex, the meso -cyanooctaethylporphyrin N -oxide complex was synthesized for the first tim... YV Morozova,ZA Starikova,BI Maksimov,... - 《Russian Chemical ...
Synthesis of N-(1-methyl-1H-indol-3-yl)methyleneamines and 3,3-diaryl-4-(1-methyl-1H-indol-3-yl)azetidin-2-ones as potential antileishmanial agents Novel azetidine-2-ones (III), obtained via Staudinger cycloaddition, are screened for their antileishmanial activity against Leishmania major....
ChemInform Abstract: (3 + 2)Cycloaddition of Cyclopropane with Vinyl Ether via Photoinduced Electron Transfer A solution of the triarylcyclopropanes (I) and ethyl vinyl ether (II) in acetonitrile is irradiated in the presence of 1,4-dicyanobenzene to yield the cycl... H Tomioka,D Kobayashi,A...