The efficient and gentle ruthenium-catalyzed meta-selective CAr–H nitration of azole ring substituted arenes has been developed.
我们开发了一种高效且温和的钌催化的对取代芳烃的唑环进行间位-选择性的CAr–H硝化的方法。
Preparation of Polyfunctionalized Aromatic Nitriles from Aryl Oxazolines
作者:A. Hess、H. C. Guelen、N. Alandini、A. Mourati、Y. C. Guersoy、P. Knochel
DOI:10.1002/chem.202103700
日期:2022.1.3
Aryl nitriles from oxazolines: We report a new method for for preparing highly functionalized tri-, tetra- and penta-substituted aromaticnitriles by using two successive magnesiations with sBu2Mg in toluene followed by trapping reactions with a broad range of electrophiles followed by an efficient conversion of the oxazolyl-directing group to a nitrile function by using oxalyl chloride and catalytic
来自恶唑啉的芳基腈:我们报道了一种制备高官能化三、四和五取代芳香腈的新方法,该方法通过在甲苯中使用s Bu 2 Mg 进行两次连续的镁化,然后与多种亲电子试剂发生捕获反应,然后使用草酰氯和催化量的 DMF(50 °C,4 小时)将恶唑基导向基团有效转化为腈官能团。
Regio- and stereoselective addition of organolithiums to naphthalenes. an efficient synthesis of 11,2-trisubstituted and trans-2-disubstituted dihydronaphthalenes
作者:A.I. Meyers、Kathryn A. Lutomski、Dominique Laucher
DOI:10.1016/s0040-4020(01)85942-1
日期:1988.1
The addition of a variety of organolithium reagents to 1-napththyloxazolines and 2-naphthyloxazolines followed by trapping with electrophiles leads to high yields of the title compounds. Very high stereoselectivity characterizes the present process in that the electrophile enters from the naphthalene face opposite to the entry of the organolithium reagent. A number of organolithiums have been investigated
experiment using phenyloxazoline-d5 was carried out in the absence of olefin, partial H/D scrambling occurred between the ortho positions of the phenyloxazoline and the SiH of triethylsilane. This labeling experiment indicates that CH bond cleavage is not the rate-determining step and that a rapid equilibrium prior to CSi bond formation (i.e. the reductive elimination step) occurs in this catalytic reaction
Atropisomer-selective 1,1-binapthyl synthesis via chirality transfer from sulfur
作者:Robert W. Baker、Geoffrey R. Pocock、Melvyn V. Sargent
DOI:10.1039/c39930001489
日期:——
4,5-Dihydro-2-(1-alkyl- or 1-aryl-sulfinylnaphthalen-2-yl)-4,4-dimethyloxazoles 3–6 undergo substitution reactions on treatment with Grignard reagents; the optically active sulfoxide 14 on treatment with 1-naphthylmagnesium bromide furnished the 1,1-binaphthyl 15 in 60% enantiomeric excess (e.e.).