A series of non-nucleoside reverse transcriptase inhibitors derived from indole-based α-amino acids were designed and synthesized. Their inhibitory activities were detected by a TZM-bl cell assay on HIV virus type HIV-1IIIB. The comprehensive understanding of the SAR was obtained by utilizing the variation of the substituents of the indole-based α-amino acids. From the screened compounds, the novel inhibitors 19 and 29 were identified to be highly potent candidates with EC50 values of 0.060 μM and 0.045 μM respectively (CC50 values of 109.545 μM and 49.295 μM and SI values of 1825.8 and 1095.4). In most cases, the variation of substituents at different positions had a significant effect on the potency of activities. The results also indicate that the indole-based α-amino acids as efficient NNRTIs displayed comparable anti-HIV-1 activities to the reference drug NVP. We hope the identification of these indole-based amino acids as efficient NNRTIs of RT could stimulate researchers to develop more diversified anti-HIV drugs.
3‐Mono‐Substituted BINOL Phosphoric Acids as Effective Organocatalysts in Direct Enantioselective Friedel–Crafts‐Type Alkylation of N‐Unprotected α‐Ketiminoester
most widely used chiral Brønsted acid organocatalysts, their structures are mostly limited to 3,3′‐disubstituted ones and simple 3‐mono‐substituted ones without any polar functionalities on the 3‐substituent have not been used in highly enantioselective reactions. This work reports such 3‐mono‐substituted analogues as effective organocatalysts in direct highly enantioselectiveFriedel–Crafts‐type alkylation
Triflic Acid-Catalyzed Highly Stereoselective Friedel−Crafts Aminoalkylation of Indoles and Pyrroles
作者:Mohammed Abid、Liliana Teixeira、Béla Török
DOI:10.1021/ol703095d
日期:2008.3.1
simple and efficient synthesis to both enantiomers of highly enantiomerically enriched alpha-trifluoromethyl-alpha-(heteroaryl)-glycine derivatives via highly stereoselective aminoalkylation of indoles and pyrroles is described. The triflic acid-catalyzed reaction of enantiomeric 3,3,3-trifluoro-pyruvate-alpha-methylbenzyl imines with indoles and pyrroles and the subsequent Pd-catalyzed hydrogenolysis of