Investigation of aliphatic dienes by chemical ionization with nitric oxide
摘要:
AbstractIt is shown that the position of the double bond close to the hydrocarbon end of an aliphatic diene functionalized at C(1) can readily be determined by chemical ionization with NO+. Owing to the low abundance of the ions characteristic for the position of the other double bond, its localization may be difficult. Measurement of the chemical ionization (nitric oxide as reagent gas) spectra of the corresponding epoxides or collision activation studies can help.
In Situ Methylene Capping: A General Strategy for Efficient Stereoretentive Catalytic Olefin Metathesis. The Concept, Methodological Implications, and Applications to Synthesis of Biologically Active Compounds
作者:Chaofan Xu、Xiao Shen、Amir H. Hoveyda
DOI:10.1021/jacs.7b06552
日期:2017.8.9
catalyst-controlled stereoselective olefinmetathesis considerably. By incorporation of commercially available Z-butene together with robust and readily accessible Ru-based dithiolate catalysts developed in these laboratories, a large variety of transformations can be made to proceed with terminal alkenes, without the need for a priori synthesis of a stereochemically defined disubstituted olefin. Reactions thus proceed
Cottier,L.; Descotes,G., Bulletin de la Societe Chimique de France, 1972, p. 1072 - 1076
作者:Cottier,L.、Descotes,G.
DOI:——
日期:——
Investigation of aliphatic dienes by chemical ionization with nitric oxide
作者:H. Budzikiewicz、St. Blech、B. Schneider
DOI:10.1002/oms.1210261205
日期:1991.12
AbstractIt is shown that the position of the double bond close to the hydrocarbon end of an aliphatic diene functionalized at C(1) can readily be determined by chemical ionization with NO+. Owing to the low abundance of the ions characteristic for the position of the other double bond, its localization may be difficult. Measurement of the chemical ionization (nitric oxide as reagent gas) spectra of the corresponding epoxides or collision activation studies can help.
Site-Selective Catalytic Carboxylation of Unsaturated Hydrocarbons with CO<sub>2</sub> and Water
作者:Morgane Gaydou、Toni Moragas、Francisco Juliá-Hernández、Ruben Martin
DOI:10.1021/jacs.7b07637
日期:2017.9.6
A catalytic protocol that reliably predicts and controls the site-selective incorporation of CO2 to a wide range of unsaturatedhydrocarbons utilizing water as formal hydride source is described. This platform unlocks an opportunity to catalytically repurpose three abundant, orthogonal feedstocks under mild conditions.
描述了一种催化协议,该协议利用水作为正式氢化物源可靠地预测和控制 CO2 的位点选择性掺入到各种不饱和烃中。该平台为在温和条件下催化重新利用三种丰富的正交原料提供了机会。