3647-74-3Relevant articles and documents
Synthesis of N-unsubstituted cyclic imides from anhydride with urea in deep eutectic solvent (DES) choline chloride/urea
Liu, Luxiao,Zhang, Hong-Yu,Yin, Guohui,Zhang, Yuecheng,Zhao, Jiquan
, p. 1351 - 1357 (2019/11/19)
N-Unsubstituted cyclic imides were readily synthesized in deep eutectic solvent (DES) choline chloride (ChCl)/urea from anhydrides with urea. Urea serves as both a DES component and a nitrogen source, which endows the protocol with advantages of smooth reaction, easy separation of products, simple recovery and recycling of ChCl/urea.
OLEFIN CYCLISATIONS OF HINDERED α-ACYLIMINIUM IONS
Wijnberg, B. P.,Speckamp, W. N.,Oostveen, A. R. C.
, p. 209 - 217 (2007/10/02)
Stereocontrolled NaBH4/H+-reduction of 3,4-cis-disubstituted N-alkenyl imides 1-5 leads to secondary hydroxylactams.Tertiary hydroxylactams are formed via addition of MeMgCl to imides 2 and 4.HCOOH-Cyclisation of the hydroxylactams affords polycyclic piperidines through stereoselective α-acyliminium ring closure.Concomitant synchronous and stepwise cyclisation pathways are operative in the anti-periplanar addition of tertiary α-acyliminium ions to Me substituted olefins 8c and 11c.
A PREFERRED METHOD FOR IMIDE PREPARATION
Crockett, Geoffrey C.,Swanson, Barry J.,Anderson, David R.,Koch, Tad H.
, p. 447 - 454 (2007/10/02)
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