- Synthesis of 2-bromomethyl-3-hydroxy-2-hydroxymethyl-propyl pyrimidine and theophylline nucleosides under microwave irradiation. Evaluation of their activity against hepatitis B virus
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Alkylation of 2-methylthiopyrimidin-4(1H)-one (1a) and its 5(6)-alkyl derivatives 1b - d as well as theophylline (7) with 2,2- bis (bromomethyl)-1,3-diacetoxypropane (2) under microwave irradia-tion gave the corresponding acyclonucleosides 1-[(3-acetoxy-2-acetoxymethyl-2-bromomethyl) prop-1- yl ]-2-methyl-thio pyrmidin-4(1H)-ones 3a - d and 7-[(3-acetoxy-2- acetoxymethyl-2-bromomethyl)prop-1- yl]theophylline (8), which upon further irradiation gave the double-headed acyclonucleosides 1,1 ′-[(2,2- diacetoxymethyl)-1,3-propylidene]- bis [(2-(methylthio)-pyrimidin-4(1H)-ones] 4a - c , and 7,7 ′-[(2,2-diacetoxymethyl)-1,3-propylidene]- bis (theophylline) (9). The deacetylated derivatives were obtained by the action of sodium methoxide. The activity of deacetylated nucleosides against Hepatitis B virus was evaluated. Compound 5b showed moderate inhibition activity against HBV with mild cytotoxicity. Copyright Taylor & Francis Group, LLC.
- Ashry,Rashed,Abdel-Rahman,Awad,Rasheed
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- Scaffold hopping in discovery of HIV-1 non-nucleoside reverse transcriptase inhibitors: From CH(CN)-DABOs to CH(CN)-dapys
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Scaffold hopping is a frequently-used strategy in the development of non-nucleoside reverse transcriptase inhibitors. Herein, CH(CN)-DAPYs were designed by hopping the cyano-methylene linker of our previous published CH(CN)-DABOs onto the etravirine (ETR). Eighteen CH(CN)-DAPYs were synthesized and evaluated for their anti-HIV activity. Most compounds exhibited promising activity against wild-type (WT) HIV-1. Compounds B4 (EC50 = 6 nM) and B6 (EC50 = 8 nM) showed single-digit nanomolar potency against WT HIV-1. Moreover, these two compounds had EC50 values of 0.06 and 0.08 μM toward the K103N mutant, respectively, which were comparable to the reference efavirenz (EFV) (EC50 = 0.08 μM). The preliminary structure-activity relationship (SAR) indicated that introducing substitutions on C2 of the 4-cyanophenyl group could improve antiviral activity. Molecular docking predicted that the cyano-methylene linker was positioned into the hydrophobic cavity formed by Y181/Y188 and V179 residues.
- Chen, Fen-Er,Li, Ting-Ting,Pannecouque, Christophe,Zhuang, Chun-Lin,de Clercq, Erik
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- Synthesis and biological evaluation of DAPY-DPEs hybrids as non-nucleoside inhibitors of HIV-1 reverse transcriptase
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A series of new DAPY-DPEs hybrids, combined the important pharmacophores of DAPYs and DPEs, has been synthesized and biologically evaluated for their anti-HIV activities against wild-type HIV-1 strain IIIB, double RT mutant (K103N + Y181C) strain RES056 and HIV-2 strain ROD in MT-4 cell cultures. Many promising candidates with potent inhibitory activity (wild-type) within the EC50 range from 0.16 to 0.013 μM were obtained. In particular, 3c, 3p, 3r and 3s displayed low nM level EC50 values (35, 13, 50 and 17 nM, respectively) and high selectivity (9342, 25131, 2890 and 11338, respectively), which were much more potent than NVP (EC50 = 0.31 μM, SI = 48), 3TC (EC50 = 2.24 μM, SI > 39), DDI (EC50 = 23.20 μM, SI > 9) and DLV (EC50 = 0.65 μM, SI > 67), and comparable to AZT (EC50 = 0.0071 μM, SI > 13144) and EFV (EC50 = 0.0062 μM, SI > 1014). The HIV-1 reverse transcriptase inhibitory assay confirmed that these DAPY-DPEs hybrids targeted HIV-1 RT. Molecular simulation was performed to investigate the potential binding mode of the newly synthesized compounds. And reasonable explanation for the activity results was discussed with docking method.
- Wu, Hai-Qiu,Yao, Jin,He, Qiu-Qin,Chen, Wen-Xue,Chen, Fen-Er,Pannecouque, Christophe,De Clercq, Erik,Daelemans, Dirk
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p. 624 - 631
(2015/01/30)
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- Structural modifications of CH(OH)-DAPYs as new HIV-1 non-nucleoside reverse transcriptase inhibitors
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A series of CR2(OH)-diarylpyrimidine derivatives (CR 2(OH)-DAPYs) featuring a hydrophobic group at CH(OH) linker between wing I and the central pyrimidine were synthesized and evaluated for their anti-HIV activity in MT-4 cell cultur
- Yan, Zi-Hong,Huang, Xia-Yun,Wu, Hai-Qiu,Chen, Wen-Xue,He, Qiu-Qin,Chen, Fen-Er,De Clercq, Erik,Pannecouque, Christophe
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p. 2535 - 2541
(2014/05/06)
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- Synthesis and biological evaluation of CHX-DAPYs as HIV-1 non-nucleoside reverse transcriptase inhibitors
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A series of new diarylpyrimidines (DAPYs) characterized by a halogen atom on the methylene linker between wing I and the central pyrimidine ring was synthesized and evaluated for their anti-HIV activity in MT-4 cell cultures. The two most promising compou
- Yan, Zi-Hong,Wu, Hai-Qiu,Chen, Wen-Xue,Wu, Yan,Piao, Hu-Ri,He, Qiu-Qin,Chen, Fen-Er,De Clercq, Erik,Pannecouque, Christophe
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p. 3220 - 3226
(2014/06/09)
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- Design, synthesis and biological evaluation of cycloalkyl arylpyrimidines (CAPYs) as HIV-1 NNRTIs
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A series of 18 cycloalkyl arylpyrimidines (CAPYs) were designed from lead compounds diarylpyrimidines (DAPYs), synthesized and evaluated for in vitro anti-HIV activity. Among them, the compound 1p displayed potent anti-HIV-1 activity against WT HIV-1 with an EC50 value of 0.055 μM and a selectivity index (SI) >7290. The preliminary structure-activity relationship (SAR) of this new series of compounds was also investigated, which enriched the SAR of diarylpyrimidines (DAPYs).
- Gu, Shuang-Xi,Yang, Shi-Qiong,He, Qiu-Qin,Ma, Xiao-Dong,Chen, Fen-Er,Dai, Hui-Fang,Clercq, Erik De,Balzarini, Jan,Pannecouque, Christophe
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p. 7093 - 7099
(2012/01/03)
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- Synthesis and structure-activity relationship of novel diarylpyrimidines with hydromethyl linker (CH(OH)-DAPYs) as HIV-1 NNRTIs
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A series of 26 diarylpyrimidines, characterized by the hydroxymethyl linker between the left wing benzene ring and the central pyrimidine, were synthesized and evaluated for in vitro anti-HIV activity. Most of the compounds exhibited moderate to excellent
- Gu, Shuang-Xi,He, Qiu-Qin,Yang, Shi-Qiong,Ma, Xiao-Dong,Chen, Fen-Er,Clercq, Erik De,Balzarini, Jan,Pannecouque, Christophe
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experimental part
p. 5117 - 5124
(2011/10/04)
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- Lead optimization of diarylpyrimidines as non-nucleoside inhibitors of HIV-1 reverse transcriptase
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Antiviral agents: A series of CN-CH2-DAPY analogues were identified as novel non-nucleoside reverse transcriptase inhibitors (NNRTIs) against HIV-1. Most of the newly synthesized compounds exhibited strong activity against wild-type HIV-1.
- Zeng, Zhao-Sen,Liang, Yong-Hong,Feng, Xiao-Qing,Chen, Fen-Er,Pannecouque, Christophe,Balzarini, Jan,De Clercq, Erik
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scheme or table
p. 837 - 840
(2011/02/24)
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- SELECTIVE INHIBITORS AGAINST Cdk4 AND Cdk6 HAVING AMINOTHIAZOLE SKELETON
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The present invention relates to a compound represented by Formula [I]: wherein X is O, S, NH or CH 2 ; Y 1 , Y 2 , Y 3 , Y 4 and Y 5 , which may be identical or different, are each CH or N; however, at least one of Y 1 , Y 2 , Y 3 , Y 4 and Y 5 is N; Z 1 and Z 2 , which may be identical or different, are each CH or N; n is an integer from 1 to 3; R 1 is a C 3 -C 8 cycloalkyl group, a C 6 -C 10 aryl group, an aliphatic heterocyclic ring or an aromatic heterocyclic ring, or a bicyclic aliphatic saturated hydrocarbon group; R 2 and R 3 , which may be identical or different, are each a hydrogen atom, a lower alkyl group, a lower alkenyl group, a C 3 -C 8 cycloalkyl group, a C 6 -C 10 aryl group, an aromatic heterocyclic ring, or the like; and R 4 is a hydrogen atom, a lower alkyl group, a C 3 -C 6 cycloalkyl group or the like, or a pharmaceutically acceptable salt or ester thereof, and a selective inhibitor against Cdk4 and/or Cdk6 or an anticancer agent containing the compound or a pharmaceutically acceptable salt or ester thereof.
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Page/Page column 94
(2010/11/25)
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- Reactions with 2-thiothymine; selective cyclization of S-substituted 2-thiothymine
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2-Thiothymine (I) undergoes S-alkylation when treated with some halo compounds such as methyl and ethyl iodides. The S-alkyl derivatives II are treated with hydrazine hydrate to produce the hydrazine derivative III, which condensed with p-chlorobenzaldehyde to give p-chlorobenzaldehydepyrimidinehydrazone derivative IV. Compound IIa reacts with phosphorus oxychloride to give 4-chloro derivative V. The chlorine atom in V undergoes nucleophilic substitution with p-chloroaniline and anthranilic acid to produce drivatives VIa,b. Dehydrative cyclization of VIb yields the pyrimido[6,1-b]quinazolin-10-one derivative VII. Treatment of V with ammonia solution gives the diamino derivative VId. Reaction of V with sodium azide produces the tetrazolo[1,5-c]pyrimidine derivative VIII. Compound I undergoes S-alkylation with α-haloketones followed by cyclization to produce the thiazolo[3,2-a]pyrimidine derivatives Xa-c. Reaction of I with bromomalononitrile produces thiazolo[3,2-a]pyrimidine-2-carbonitrile derivative XII. Treatment of XII with formic acid, formamide and ammonium thiocyanate produces thiazolo[3,2-a:4,5-d]dipyrimidine derivatives XIIIa-c. Finally, reacting XII with malononitrile yields ppyrido[2′,3′:4,5]thiazolo[3,2-a]pyrimidine-3-carbonitrile derivative XIV.
- Youssef, Mohamed M.,Youssef, Ayman M. S.
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- Amino acid derivatives, pharmaceutical compositions containing these compounds and processes for preparing them
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NPY-antagonistic compounds of the formula STR1 Exemplary are: (A) (R)-N-[[4-(Aminocarbonylaminomethyl)phenyl]methyl]-N 2-bis(4-hydroxyphenyl)acetyl]-argininamide-trifluoracetate;(B) (R)-N-[[4-(Aminocarbonylaminomethyl)phenyl]methyl]-N 2-[bis(4-chlorphenyl)acetyl]-argininamide-trifluoracetate;(C) (R)-N-[[4-Aminocarbonylaminomethyl)phenyl]methyl]-N 2-(diphenylacetyl)-argininamide-trifluoracetate;(D) (R)-N 2-(Diphenylacetyl)-N-[[4-(ethoxycarbonylmethylamino-carbonylaminomethyl) phenyl]methyl]-argininamide-trifluoroacetate;(E) (R,S)-N 5-(Aminoiminomethyl)-N 2-(diphenylacetyl)-N-[(4-hy-droxyphenyl)methyl]-N 5-methyl-ornithinamide-hydrochloride; (F) (R)-N-[[4-(Aminocarbonylmethyl)phenyl]methyl]-N 2-(diphenyl-acetyl)-argininamide-diacetate;(G) (R)-N. sup. 2-(Diphenylacetyl)-N-[[4-(ethylaminocarbonylamino-methyl)-phenyl]methyl]-argininamide-bis-(trifluoroacetate); and,(H) (R)-N. sup.2-(Diphenylacetyl)-N-[[4-(ethoxycarbonylamino-carbonylaminomethyl) phenyl]methyl]-argininamide-trifluoroacetate.
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- 1,3-Dipolar cycloaddition approach to the construction of new bis-heterocycles from thymine as potential non-nucleoside reverse transcriptase inhibitors
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In the search for new anti-HIV agents, a synthetic route to novel acyclic (flexible) and tricyclic bis-heterocycles has been explored involving in the key steps the [3 + 2] cycloaddition reaction of the N-3 thymine-substituted enamines 34, 36 and 39 with
- Perez, Caroline,Janin, Yves L.,Adams, David R.,Monneret, Claude,Grierson, David S.
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p. 901 - 911
(2007/10/03)
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