Structure-activity relationships in open ansa-chain rifamycin S derivatives as inhibitors of HIV-1 reverse transcriptase

C. Bartolucci, L. Cellai, M. Marzano, A. Segre, M. Brufani, L. Filocamo, A. D. Bianco, M. Guiso, V. Brizzi, A. Benedetto, A. Di Caro

Research output: Contribution to journalArticlepeer-review

Abstract

Three types of open ansa-chain rifamycin S derivatives have been prepared: derivatives with the ansa-chain open at C(29) and the original dihydrofuranone ring; derivatives with the ansa-chain open at C(29) and a furane ring; derivatives with the ansa-chain at open NH-C(15). Only derivatives of the first type are weak inhibitors of HIV-1 reverse transcriptase (IC50 ca. 300 μM) while derivatives of the two other types are inactive. It has been hypothesized that the active derivatives inhibit the viral enzyme interacting through the groups C(14)H3, C(13)H3, and C(1)O at the same site as the well-known inhibitors TIBO and Nevirapine. In particular C(13)H3 must be unhindered and in an appropriate position out of the plane containing the chromophore-rings. The open ansa-chain seems to play the role of a lipophylic substituent.

Original languageEnglish
Pages (from-to)587-593
Number of pages7
JournalFarmaco
Volume50
Issue number9
Publication statusPublished - 1995

ASJC Scopus subject areas

  • Drug Discovery
  • Pharmaceutical Science

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