Synlett 2007(15): 2309-2320  
DOI: 10.1055/s-2007-985602
ACCOUNT
© Georg Thieme Verlag Stuttgart · New York

Chiral Ligands with an Isoborneol-10-sulfonamide Structure: A Ten-Year Odyssey

Diego J. Ramón*, Miguel Yus*
Instituto de Síntesis Orgánica (ISO) and Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
Fax: +35(965)903549; e-Mail: djramon@ua.es; e-Mail: yus@ua.es;
Further Information

Publication History

Received 12 March 2007
Publication Date:
22 August 2007 (online)

Abstract

The isoborneol-10-sulfonamide unit represents a new type of chiral structure that has been successfully prepared and used in different reactions of organometallic addition to aldehydes and ketones. The obtained results were excellent in some cases, and this type of ligand is unique as it is able to promote the enantioselective addition of dialkylzinc reagents to simple ketones. The scope of these catalyzed reactions, together with some synthetic applications, is outlined. References to important related work from others are also included.

1 Introduction

2 First-Generation Ligands

2.1 Enantioselective Addition of Organozinc Reagents to ­Aldehydes

2.2 Enantioselective Addition to Ketones

3 Second-Generation Ligands

3.1 Enantioselective Addition of Organozinc Reagents to ­Aldehydes

3.2 Enantioselective Addition to Ketones

4 Third-Generation Ligands

5 Outlook

47

Forrat, V. J. unpublished results.