First stereoselective pinacol coupling in the [2.2]paracyclophane series
作者:Elena V. Sergeeva、Valeria I. Rozenberg、Dmitrii Yu. Antonov、Evgenii V. Vorontsov、Zoya A. Starikova、Henning Hopf
DOI:10.1016/s0957-4166(02)00315-4
日期:2002.6
The planar chiral N-arylimines of [2.2]paracyclophane undergo stereoselective pinacol coupling under the action of the Zn/Cu couple in the presence of p-TosOH, thus forming N-aryl substituted 1,2-diamines. The stereoselective formation of the asymmetric centers is governed by the planar chiral [2.2]paracyclophanyl moiety. (C) 2002 Elsevier Science Ltd. All rights reserved.
Novel Multichiral Diols and Diamines by Highly Stereoselective Pinacol Coupling of Planar Chiral [2.2]Paracyclophane Derivatives
作者:Elena V. Sergeeva、Valeria I. Rozenberg、Dmitrii Yu. Antonov、Evgenii V. Vorontsov、Zoya A. Starikova、Ivan V. Fedyanin、Henning Hopf
DOI:10.1002/chem.200500413
日期:2005.11.18
coupling of the planar chiral carbonyl compounds [2.2]paracyclophane-4-carbaldehyde, 4-acetyl[2.2]paracyclophane (ketone) and the four regioisomeric 5-, 7-, 12- and 13-methoxy[2.2]paracyclophane-4-carbaldehydes as well as the pTosOH-Zn/Cu-promoted coupling of their N-substituted imines is described. Coupling of the enantiomerically pure substrates (most of carbonyl compounds and all imines) occurs stereoselectively