Isolable conformers of 2-alkylamino-N-(2′-alkylphenyl)succinimide were stereoselectively synthesized by amination of N-(2′-alkylphenyl)maleimides. The rotational barrier and the α-methylation of them were investigated.
An aza-Michael addition between a maleimide and amines is described in which the presence of simple amine receptors (TMEDA or trans-TMCDA) promote the chemo selectivity of the reaction (respectively, 1,2- and 1,4-addition). Additionally, both receptors are able to accelerate the reaction. Stoichiometries of complexes between receptors and amines were determined by H-1 NMR dilution experiments while enantiomeric excesses were observed on 1,4-adducts by using (1R,2R)-TMCDA. (C) 2004 Elsevier Ltd. All rights reserved.
Kishikawa Keiki, Tsuru Isao, Kohmoto Shigeo, Yamamoto Makoto, Yamada Kazu+, Chem. Lett, (1994) N 9, S 1605-1606
An efficient Cu(OAc)2/Ag2CO3-cocatalyzed approach for the synthesis of 3-aminomaleimides and 3-amino-4-indolylmaleimides has been developed with satisfactory yields. A series of primary and secondary amines are compatible with this reaction. In addition, treatment of maleimides with primary amines using 1 equiv. of CuCl2 leads to the formation of chloroamination products such as 3-amino-4-chloromaleimides