Solvent‐Free Rapid Deprotection of Ketone and Aldehyde Oximes using Periodic Acid
摘要:
Ketone and aldehyde oximes can be readily converted to the corresponding carbonyl compounds in high yields under solvent-free conditions when treated with periodic acid. Oximes bearing aliphatic C=C bonds can be selectively deoximated. The advantages of this protocol include a rapid reaction rate and a simple workup procedure. No volatile organic solvents are required in the reaction processes.
A novel series of benzophenone oxime ether derivatives with tertiary amine groups were synthesized and their herbicidal activities of 24 compounds against Oryza sativa, Sorghum sudanense, Brassica chinensis, and Amaranthus mangostanus L. were also evaluated. Most of these compounds exhibited significant inhibitory effect on root growth at 20 ppm. Based on the herbicidal activity data, computational
Highly efficient synthesis of amides from ketoximes using trifluoromethanesulphonic anhydride
作者:Rajesh G. Kalkhambkar、Hemantkumar M. Savanur
DOI:10.1039/c5ra07789c
日期:——
anhydride (triflic anhydride: TA) has been successfully used as a reagent for Beckmann rearrangement in the conversion of a variety of ketoximes into amides without any additive or base. This reagent works well for the synthesis of a library of amides with excellent yields.
CuI-catalyzed oxidative cross coupling of oximes with tetrahydrofuran: a direct access to O-tetrahydrofuran-2-yl oxime ethers
作者:Zhi-Hui Ren、Mi-Na Zhao、Zheng-Hui Guan
DOI:10.1039/c5ra27899f
日期:——
An efficient copper(I)-catalyzed oxidative tetrahydrofuranylation of oximes has been developed. This reaction shows good functional group tolerance and various substituted ketoximes and aldoximes coupled smoothly with THF to give the corresponding O-tetrahydrofuran-2-yl oxime ethers in high yields.
Beckmann Rearrangement of Substituted Diaryl Ketoximes Using Fecl<sub>3</sub>Impregnated Montmorillonite K10
作者:S. G. Pai、A. R. Bajpai、A. B. Deshpande、S. D. Samant
DOI:10.1080/00397919708006036
日期:1997.2
Abstract Montmorillonite K10 was impregnated with FeCl3 in acetonitrile. The catalyst was found to catalyze the Beckmannrearrangement of substituted diaryl ketoximes significantly, giving selectively anti migration.
O-Vinyldiaryl- and O-vinylaryl(hetaryl)ketoximes: a breakthrough in O-vinyloxime chemistry
作者:Alexey B Zaitsev、Alexander M Vasil'tsov、Elena Yu Schmidt、Al'bina I Mikhaleva、Ludmila V Morozova、Andrey V Afonin、Igor' A Ushakov、Boris A Trofimov
DOI:10.1016/s0040-4020(02)01304-2
日期:2002.12
O-Vinyldiarylketoximes and O-vinylaryl(hetaryl)ketoximes, a novel family of stable O-vinyloximes, are synthesized by a straightforward, unusually fast vinylation of diarylketoximes and aryl(hetaryl)ketoximes with acetylene in a superbase system of KOH–DMSO (60–80°C, 5–7 min). Yields of up to 90% were obtained, thus introducing into organic synthesis a new group of highly promising building blocks and monomers.