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Title: Synthesis of novel thienonorbornylpurine derivatives
Authors: Hrebabecky, Hubert ×
Dejmek, Milan
Sala, Michal
Mertlikova-Kaiserova, Helena
Dracinsky, Martin
Leyssen, Pieter
Neyts, Johan
Nencka, Radim #
Issue Date: Apr-2012
Publisher: Pergamon Press
Series Title: Tetrahedron vol:68 issue:15 pages:3195-3204
Abstract: The synthesis and antiviral evaluation of 6-amino- and 6-chloro-9-(exo-bicyclo[2.2.1]hept-2yl)-9H-purine derivatives with thiophene and tetrahydrothiophenes annelated to a norbornane moiety are described. The key step in the synthesis of derivatives with the symmetrically annelated thiophene was the Mitsunobu reaction of endo-4-thiatricyclo[5.2.1.0(2,6)]deca-2,5-dien-8-ol with 6-chloropurine. The key alcohol was obtained by DDQ mediated aromatization of the corresponding tetrahydro derivatives, which were used for the preparation of the target tetrahydrothieno analogs. The key intermediate for the synthesis of derivatives with the asymmetrically annelated thiophene was 8-exo-azido-3-thiatricyclo[5.2.1.0(2,6)]deca-2(6),4-diene, which was prepared from 5-exo-azido[2.2.1]heptan-2-one by aldol condensation with O-ethyl S-(2-oxoethyl) carbonodithioate, deprotection and cyclization. The target compounds were obtained by the construction of the purine base on an amine, which was obtained by LAH reduction of the key azide. The synthesized compounds were evaluated for antiviral and cytostatic activity. (C) 2012 Elsevier Ltd. All rights reserved.
ISSN: 0040-4020
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Laboratory of Virology and Chemotherapy (Rega Institute)
× corresponding author
# (joint) last author

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