Hypervalent λn-iodane-mediated fragmentation of tertiary cyclopropanol systems
摘要:
The oxidation of tertiary cyclopropyl silyl ethers with hypervalent lambda(n)-iodanes caused fragmentation which produced alkenoic acids or esters. (C) 1998 Elsevier Science Ltd. All rights reserved.
Generation of<i>β</i>-Carbonyl Radicals from Cyclopropanol Derivatives by the Oxidation with Manganese(III) 2-Pyridinecarboxylate and Their Reactions with Electron-Rich and -Deficient Olefins
Various β-carbonyl radicals are generated oxidatively from cyclopropanol derivatives by the use of manganese(III) 2-pyridinecarboxylate (Mn(pic)3). These β-carbonyl radicals react with electron-rich olefins such as conjugated silyl enol ethers, a ketene thioacetal, a ketene dithioacetal, and a vinyl ether intermolecularly to give crossed-addition products in good yield. Furthermore, the combined use
reactions of enol ethers (ROCC, R = alkyl, silyl) with zinc carbenoid reagents were found to give allylic ethers in several cases along with the expected cyclopropylethers. The ratio of these two products was highly dependent on the concentration of the reaction mixture. Thus, the selective formation of each product was conveniently attained by merely changing the amounts of the solvent used. Zinc iodide
Reaction of FeCl3 with 7-chloro-1-silyloxybicyclo[4-1-0]heptanes : A way to 2-(1-chloroalkylidene)cyclohexanones
作者:L Blanco、A Mansour
DOI:10.1016/0040-4039(88)85131-1
日期:1988.1
The regioselectivity of the FeCl3-promoted cleavage of the title compounds was studied : 2-(1,1-dichloroalkyl)cyclohexanones were obtained which were converted to 2-(l-chloroalkylidene)cyclohexanones by dehydrochlorination.
Stereochemistry of the lead(IV) acetate fragmentation of 1-(trimethylsiloxy)bicyclo[n.1.0]alkanes
作者:George M. Rubottom、Ellen C. Beedle、Chong Wan Kim、Robert C. Mott
DOI:10.1021/ja00300a025
日期:1985.7
Preparation des exo- et endo-trimethylsiloxy-1 bicyclo [n.1.0] alcanes methyl-substitues et etude de leurs reactions avec l'acetate de Pb(IV) et le diazomethane pour donner les alcenoates de methyle cis- et trans correspondants. La decomposition est stereospecifique
制备 de exo- et 内-三甲基甲硅烷氧基-1 双环 [n.1.0] 烷烃甲基取代等练习曲 de leurs 反应 avec l'acetate de Pb(IV) et le diazomethane pour donner les alcenoates demethyle cis-et trans 对应物。La 分解 est 立体特异性
Nitrene-promoted α-Alkoxylation of Amides with Silyl Ethers
Thermolysis of a solution of amides, silyl ethers, and ethyl azidoformate caused the introduction of several alkoxy groups into the positions adjacent to the amide nitrogen.