Synthesis 2006(11): 1853-1857  
DOI: 10.1055/s-2006-926469
PAPER
© Georg Thieme Verlag Stuttgart · New York

Anchimeric Assistance in the Case of Vicinal Dimesylate: Formation of Enantiomeric or meso-Bimorpholine

Tõnis Kanger*a, Marju Laarsa, Kadri Kriisa, Tiiu Kailasa, Aleksander-Mati Müüriseppa, Tõnis Pehkb, Margus Loppa
a Department of Chemistry, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia
b National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia
Fax: +372(6)202828; e-Mail: kanger@chemnet.ee;
Further Information

Publication History

Received 15 December 2005
Publication Date:
05 May 2006 (online)

Abstract

An anchimeric effect of vicinal dimesylate in the intramolecular nucleophilic substitution by amine is described. One sulfonate group of the dimesylate acts as an internal nucleophile and the other as a leaving group, affording meso-bimorpholine in the intramolecular cyclization. ω,ω′-Dimesylate omits this effect and the target compound is obtained with high ee.