Synthesis 2003(14): 2236-2240
DOI: 10.1055/s-2003-42086
PAPER
© Georg Thieme Verlag Stuttgart · New York

Application of Polystyrene Bound Ethoxymethyl (PEOM) Chloride in the Solid­-Phase Synthesis of Substituted 1-Methyl-1H-Indoles

Thomas Ruhland*, Henrik Pedersen, Kim Andersen
Medicinal Chemistry Research, H. Lundbeck A/S, 9 Ottiliavej, 2500 Valby, Denmark
Fax: +4536301385; e-Mail: tr@lundbeck.com;
Further Information

Publication History

Received 25 June 2003
Publication Date:
24 September 2003 (online)

Abstract

A novel linker for the solid-phase synthesis of substituted 1-methylindoles has been developed. The linker is stable under strong basic conditions and compatible with a broad range of chemical transformations as demonstrated by electrophilic and nucleophilic substitution reactions in the 2-position of the indole nucleus. Indoles are cleaved under reductive conditions by use of alane resulting in 1-methylindole derivatives. Sensitive functional groups in the indole moiety such as aldehydes, ketones, esters, imines, and amides are reduced simultaneously.