Copper(I)-Catalyzed Aerobic Oxidation of α-Diazoesters
作者:Changming Xu、Yongchang Wang、Lei Bai
DOI:10.1021/acs.joc.0c01744
日期:2020.10.2
α-ketoesters using molecular oxygen as an oxidant has been developed. Both electron-poor and electron-rich aryl α-diazoesters are suitable substrates and provide the α-ketoesters in good yields. In this oxidative system, α-diazo-β-ketoesters are also compatible as substrates but unexpectedly furnish α-ketoesters via C–C bond cleavage, rather than the vicinaltricarbonylproducts.
Ammonium ylides generated in situ from phenyldiazoacetates and anilines undergo asymmetric N−H insertionreactions catalyzed by cinchona alkaloids (1 mol %), affording phenylglycines up to 74% ee.
Potassium Fluoride on Alumina: Oxidative Coupling of Acidic Carbon Compounds with Diiodine
作者:Didier Villemin、Abdelkrim Ben Alloum
DOI:10.1080/00397919208021130
日期:1992.12
Diiodine reacts at room temperature with activated methylene compounds in the presence of potassium fluoride on alumina and saturated dimers, unsaturated dimers or trimers were formed according to the stoechiometry of the reaction. The reactions were improved by using ultrasound activation.
Tributylstibine mediated synthesis of 1,1,2-tri-substituted cyclopropanes
作者:Chen Chen、Liao Yi、Huang Yao-Zeng
DOI:10.1016/s0040-4020(01)80128-9
日期:1989.1
Ruegheimer, Chemische Berichte, 1882, vol. 15, p. 1626