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Original Article

Isatin thiazoline hybrids as dual inhibitors of HIV-1 reverse transcriptase

, , , , , , & show all
Pages 130-136 | Received 09 Aug 2016, Accepted 05 Sep 2016, Published online: 21 Oct 2016

Figures & data

Table 1. Analytical data of derivatives EMAC 3039–3064.

Table 2. 1H NMR data of derivatives EMAC 3039–3064.

Table 3. Activity of compounds EMAC 3039–3063 on HIV-1 RT-associated enzymatic functions RDDP and RNase H.

Figure 1. Synthetic pathway to compounds EMAC 3039–3063; reagents and conditions: (i) methylisothiocyanate, hydrazine hydrate, ethanol, rt; (ii) 1-amino-3-methylisothiourea, substituted isatin, ethanol, reflux; (iii) 2, substituted acetophenones, isopropanol, rt.

Figure 1. Synthetic pathway to compounds EMAC 3039–3063; reagents and conditions: (i) methylisothiocyanate, hydrazine hydrate, ethanol, rt; (ii) 1-amino-3-methylisothiourea, substituted isatin, ethanol, reflux; (iii) 2, substituted acetophenones, isopropanol, rt.

Figure 2. Putative binding modes of EMAC2045 and EMAC2056 and critical residues individuated for their binding in the pocket 1: (a, d) EMAC2045-HIV-1 RT complex and EMAC2056-HIV-1 RT complex; (b and e) close-up into the EMAC2045 and EMAC2056 binding site; (c and f) 2D depiction of EMAC2045 and its respective interactions with RT residues. pale yellow sphere indicates hydrophobic interactions with lipophilic residues. Red arrow indicates a hydrogen bond (HB) acceptor interaction, while the violet sphere represents the aromatic π − π stacking interaction.

Figure 2. Putative binding modes of EMAC2045 and EMAC2056 and critical residues individuated for their binding in the pocket 1: (a, d) EMAC2045-HIV-1 RT complex and EMAC2056-HIV-1 RT complex; (b and e) close-up into the EMAC2045 and EMAC2056 binding site; (c and f) 2D depiction of EMAC2045 and its respective interactions with RT residues. pale yellow sphere indicates hydrophobic interactions with lipophilic residues. Red arrow indicates a hydrogen bond (HB) acceptor interaction, while the violet sphere represents the aromatic π − π stacking interaction.

Figure 3. Putative binding modes of EMAC2045 and EMAC2056 and critical residues individuated for their binding in the pocket 2: (a, d) EMAC2045-HIV-1 RT complex and EMAC2056-HIV-1 RT complex; (b and e) close-up into the EMAC2045 and EMAC2056 binding site; (c and f) 2D depiction of EMAC2045 and its respective interactions with RT residues. pale yellow sphere indicates hydrophobic interactions with lipophilic residues. Red arrow indicates a hydrogen bond (HB) acceptor interaction, green HB donor, while the violet sphere represents the aromatic π − π stacking interaction.

Figure 3. Putative binding modes of EMAC2045 and EMAC2056 and critical residues individuated for their binding in the pocket 2: (a, d) EMAC2045-HIV-1 RT complex and EMAC2056-HIV-1 RT complex; (b and e) close-up into the EMAC2045 and EMAC2056 binding site; (c and f) 2D depiction of EMAC2045 and its respective interactions with RT residues. pale yellow sphere indicates hydrophobic interactions with lipophilic residues. Red arrow indicates a hydrogen bond (HB) acceptor interaction, green HB donor, while the violet sphere represents the aromatic π − π stacking interaction.