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...
关键词 手性氮氧; 镍; [8+2]环加成; 螺环; 不对称催化 Catalytic Asymmetric [8+2] Cycloaddition for the Construction of Cycloheptatriene-Fused Pyrrolidin-3,3'-Oxindoles Xie, Mingsheng Wu, Xiaoxia Wang, Gang Lin, Lili Feng, Xiaoming* (Key Laboratory of Green Chemistry & Technology, Ministry ...
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....
[reaction: see text] The Z and E nitrones 38 and 39 from condensation of aldehyde 20 with hydroxylamine 36 underwent intramolecular dipolar cycloaddition t... JD White,JD Hansen 被引量: 0发表: 2020年 Identification of risk factors for carbamazepine-induced serious mucocutaneous adverse reactions:...
1,3-dipolar cycloaddition of diphenylnitrilimine to substituted dihydro-3-methylene-2(3H)-furanones Substituted 4,5-dihydro-3-methylene-2(3H)-furanones 1 react as dipolarophiles with diphenylnitrilimine to give the corresponding spiro[furan-pyrazolin]ones... Slávka,Štverková,Zdirad,... ...
An efficient and regiospecific synthesis of 1,5-diaryl-4-benzothiazolyl-1,2,3-triazoles by organocatalytic 1,3-dipolar cycloaddition reactions The 1,8-diazabicyclo[5,4,0]undec-7-ene is used as organocatalyst, and the 2-(1,5-diaryl-1 H -1,2,3-triazol-4-yl)benzo[ d ]thiazoles ....
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 ...
Cyclophane, 6: Neue [2.2]Paracyclophane durch Addition von Acetylenderivaten an 1,2,4,5-Hexatetraen The tetrasubstituted [2.2]paracyclophanes 4c - f are formed by cycloaddition of the symmetrical acetylene derivatives 1c - f to 1,2,4,5-hexatetraene ( 2 ), and their constitution and config...
The rate constant (k[sub q]) for the quenching of *Ru(bpy)[sub 3][sup 2+] by methylviologen (MV[sup 2+]) has been determined as a function of the mole frac... H Sun,A Yoshimura,MZ Hoffman - 《Journal of Physical Chemistry》 被引量: 86发表: 1994年 On interface dipole layers...
The sterically bulky t-Bu-substituted derivatives of 1,1,2,2-tetraphenyl-3,8-dichlorobuta[b]naphthalene (5), trans-1,2-tert-butyl-1,2-diphenyl- (8) and 1,1-di-tert-butyl-2,2-diphenyl-3,8-dichlorocyclobuta[b]naphthalene (12), were prepared. X-ray analysis of 8 and 12 at 150 ...