cycloaddition,英語單詞,主要用作名詞,作名詞時譯為“環加成作用”。
基本介紹
- 外文名:cycloaddition
- 詞性:名詞
- 發音:[,saikləuə'diʃən]
- 釋義:環加成作用
cycloaddition,英語單詞,主要用作名詞,作名詞時譯為“環加成作用”。
環加成(cycloaddition)是2016年經全國科學技術名詞審定委員會審定發布的化學名詞。定義 兩個或更多不飽和分子(或分子內的部分)組合形成1個環加成產物並伴隨著重鍵數的減少。環加成反應常用象徵符號[i+j+…]表示,i和j表示從反應底物到...
環加成反應(cycloaddition reaction)是在光或熱的條件下,兩個或多個不飽和分子通過雙鍵相互加成生成環狀化合物的反應。環加成反應在反應過程中不消除小分子,而且只生成σ-鍵,而沒有σ-鍵的斷裂。Diels-Alder反應就是典型的環加成反應...
負離子環加成 負離子環加成(anionic cycloaddition )是2016年公布的化學名詞。定義 共軛4π電子體系中有負離子取代基存在的環加成反應。出處 《化學名詞》第二版。
(1,3-dipolar cycloaddition)是發生在1,3-偶極體和烯烴、炔烴或相應衍生物之間的環加成反應,產物是一個五元雜環化合物。烯烴類化合物在反應中稱親偶極體。德國化學家Rolf Huisgen首先廣泛套用此類反應製取五元雜環化合物,因此它也稱為...
環加成反應(cycloaddition reactions)的常用試劑。物化性質 外觀(Appearance): 無色或淡黃色液體 密度:1.125g/cm3 熔點:-65℃ 沸點:89.5°C at 760 mmHg 閃點:6.7°C 蒸汽壓:58.4mmHg at 25°C 折射率:1.429-1....
3.1 The Diels-Alder cycloaddition reaction 3.1.1 The dienophile 3.1.2 The diene 3.1.3 Regiochemistry of the Diels-Alder reaction 3.1.4 Stereochemistry of the Diels-Alder reaction 3.1.5 Intramolecular Diels-Alder ...
(7) Wang, Yang,Wei, Donghui*, Zhang, Wenjing*, Recent Advances on Computational Investigations of N-Heterocyclic Carbene Catalyzed Cycloaddition/Annulation Reactions: Mechanism and Origin of Selectivities,ChemCatChem,2018, 10, ...
3.You-Yun Zhou, Jun Li, Lin Ling, Sai-Hu Liao, Xiu-Li Sun,* Yu-Xue Li,* Li-Jia Wang, Yong Tang* Highly Enantioselective [3+3] Cycloaddition of Aromatic Azomethine Imines with Cyclopropanes Directed by p–p ...
17.WeiliangChen,LiliLin,YunfeiCai,YongXia,WeidiCao,XiaohuaLiuandXiaomingFeng*,Catalyticasymmetric[3+2]cycloadditionofaromaticaldehydeswithoxiranesbyC–Cbondcleavageofepoxides:highlyefficientsynthesisofchiral1,3-dioxolanes,Chem.Commun...
2. Wanchun Gong, Yun Liu, Jie Zhang, Yingdong Jiao, Jijun Xue,* and Ying Li*. Regio- and Stereoselective [4+3] Cycloaddition Towards Fused 5,7,6-Tricyclic Skeletons. Chem. Asian J., 2013,8, 546–551.3. Jie...
2.Qian-Qian Yang, Xiang Yin, Xiao-Long He, Wei Du*, Ying-Chun Chen*, Asymmetric Formal [5 + 3] Cycloadditions with Unmodified Morita–Baylis–Hillman Alcohols via Double Activation Catalysis, ACS Catal., 2019, 9, ...
[12] Xing-zhong Shu, Casi M. Schienebeck, Wangze Song, Ilia A. Guzei, and Weiping Tang*, “Transfer of Chirality in Rhodium-Catalyzed Intramolecular (5+2) Cycloaddition of 3-Acyloxy-1,4-enyne (ACE) and Alkyne:...