Reactions of mono- and bicyclic enol ethers with the I<sub>2</sub>–hydroperoxide system
作者:Alexander O. Terent'ev、Alexander T. Zdvizhkov、Alena N. Kulakova、Roman A. Novikov、Ashot V. Arzumanyan、Gennady I. Nikishin
DOI:10.1039/c3ra46462h
日期:——
Reactions of mono- and bicyclic enol ethers with I2–H2O2, I2–ButOOH, and I2–tetrahydropyranyl hydroperoxide systems have been studied. It was shown that the reaction pathway depends on the nature of peroxide and the ring size. The reaction of 2,3-dihydrofuran and 3,4-dihydro-2H-pyran with the I2–hydroperoxide system affords iodoperoxides, α-iodolactones, and α-iodohemiacetals. Bicyclic enol ethers
Epoxyannulation II: Cyclization of ω-ketosulfonium salts
作者:M.E. Garst、A.T. Johnson
DOI:10.1016/0040-4039(80)80146-8
日期:1980.1
Treatment of 1,5 or 1,6 ketosulfonium salts with potassium t-butoxide has yielded cyclic epoxides of high stereochemical purity in good yield.
用叔丁醇钾处理1,5或1,6酮os盐可以高产率获得具有高立体化学纯度的环状环氧化物。
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作者:Yu. N. Ogibin、A. V. Kutkin、A. O. Terent"ev、G. I. Nikishin
DOI:10.1023/a:1021336031371
日期:——
A new method for the synthesis of n-(3-acyloxypropyl)-substituted six- to thirteen-membered alkan-n-olides was developed. The method is based on the H2SO4-catalyzed reactions of oxabicycloalkenes, obtained from 2-(3-acetoxypropyl)cycloalkanes, with H2O2 and formic or acetic acid. The method includes the subsequent transformations of oxabicycloalkenes; into bicyclic hydroperoxides, peroxy ethers, and, at the final stage, into target lactones formed in 56-71% yields. These transformations are carried as a one-pot reaction.
Epoxyannulation. 4. Reactions of 1,5-, 1,6-, and 1,7-oxosulfonium salts
作者:Michael E. Garst、Bill J. McBride、Alan T. Johnson
DOI:10.1021/jo00149a003
日期:1983.1
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作者:Yu. N. Ogibin、A. O. Terent"ev、V. P. Ananikov、G. I. Nikishin
DOI:10.1023/a:1015009603719
日期:——
Hydroperoxidation of C=C-bridged 2-oxabicycloalkenes in which the five- or six-membered oxacycle is fused with the five-, six-, or twelve-membered hydrocarbon ring was studied. The Cu(OAc)(2)-catalyzed decomposition of the resulting hydroperoxides afforded nine-, ten-, or fifteen-membered trans-alkenolides, respectively. The latter compounds were obtained as pairs of regioisomers, with the isomers in which the double bond is more remote from the ether oxygen atom predominating.