Functional desymmetrization of 1,3-dioximes for the obtention of 1,2,3-hetero trisubstituted carbocycles
作者:Valdemar B.C. Figueira、Arantxa G. Esqué、Ravi Varala、Concepción González-Bello、Sundaresan Prabhakar、Ana M. Lobo
DOI:10.1016/j.tetlet.2010.02.048
日期:2010.4
Carbocylic 1,3-dioximes react with acyl chlorides giving systems that may, upon heating, suffer [3,3]-sigmatropic rearrangements in high yields in only one of the oximes esters, yielding 1,3-dinitrogen-2-oxygen trisubstituted carbocycles. Use of more reactive electrophiles, such as p-toluenesulfonyl chloride and diethyl chlorophosphate, introduces the halogen at position 2, while cleaving the N-O bond of just one of the oxime functions. (C) 2010 Elsevier Ltd. All rights reserved.
Bio-based synthesis of cyclopentane-1,3-diamine and its application in bifunctional monomers for poly-condensation
作者:Christian A. M. R. van Slagmaat、Jurrie Noordijk、Luciano G. Monsegue、Siri Mogensen、Darya Hadavi、Peiliang Han、Peter J. L. M. Quaedflieg、Gerard K. M. Verzijl、Paul L. Alsters、Stefaan M. A. De Wildeman
DOI:10.1039/d1gc02372a
日期:——
oxime hydrogenation of CPDX over Rh/C to afford the desired CPDA. In addition, diastereomerically pure cis- and trans-isomers of CPDA were reacted with (A) bio-based lactones, and (B) 5-(hydroxymethyl)furfural (HMF) to synthesize novel bifunctional diol monomers with internal amide and imine groups, respectively. Monomer 5, derived using γ-valerolactone (GVL), was successfully applied in the synthesis