A series of conformationally constrained analogues of Linezolid were synthesised by employing a tandem SN2 and SNAr reaction as the key step and tested for antibacterial activity. While the hexahydroazolo-quinoxaline compounds were inactive, the tetrahydroazolo-benzothiazine compounds exhibited interesting antibacterial activity. The introduction of fluorine in the aromatic ring further made the compounds more potent in acetamide compounds resulting in an interesting analogue 32. However, the introduction of fluorine (analogue 34) on the already potent non-fluorine thiocarbamate 21 did not have any influence on the activity. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis of Conformationally Constrained Analogues of Linezolid: Structure−Activity Relationship (SAR) Studies on Selected Novel Tricyclic Oxazolidinones
作者:Natesan Selvakumar、Deekonda Srinivas、Manoj Kumar Khera、Magadi Sitaram Kumar、Rao N. V. S. Mamidi、Hemanth Sarnaik、Chandrashekar Charavaryamath、Bonthu Srinivasa Rao、Mohammed A. Raheem、Jagattaran Das、Javed Iqbal、Ramanujam Rajagopalan
DOI:10.1021/jm020092y
日期:2002.8.1
synthesized a series of novel tricyclic molecules mimicking the conformationally constrained structure of the oxazolidinone antibacterial, Linezolid 1. The structure 3 obtained by this approach was synthesized and found to be moderately active against a panel of Gram-positive organisms tested. Further introduction of a fluorine atom in the aromatic ring of compound 3 as in Linezolid resulted in some excellent