Synthesis and 2D QSAR of O-sulphonated β-aminols derivatives as novel antifungal and antibacterial agents
摘要:
Synthesis of a series of beta-aminol derivatives using regioselective opening reaction catalyzed by SiO2 (60-120 mesh) and O-sulphonation in THF-KOH system, comprising tert-butoxycarbonyl at secondary nitrogen and evaluate for various stains of bacteria and fungi. SAR study of synthesized compound using backward regression analysis. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis and 2D QSAR of O-sulphonated β-aminols derivatives as novel antifungal and antibacterial agents
摘要:
Synthesis of a series of beta-aminol derivatives using regioselective opening reaction catalyzed by SiO2 (60-120 mesh) and O-sulphonation in THF-KOH system, comprising tert-butoxycarbonyl at secondary nitrogen and evaluate for various stains of bacteria and fungi. SAR study of synthesized compound using backward regression analysis. (C) 2011 Elsevier Ltd. All rights reserved.
Diastereoselective Cobalt-Catalyzed Reductive Aldol Cyclizations Using Diethylzinc as the Stoichiometric Reductant
作者:Hon Wai Lam、Pekka M. Joensuu、Gordon J. Murray、Euan A. F. Fordyce、Oscar Prieto、Thomas Luebbers
DOI:10.1021/ol061329d
日期:2006.8.1
text] Cobalt catalysis enables a new method for the generation of zinc enolates using diethylzinc to reduce alpha,beta-unsaturated amides. This method has been applied to a high-yielding diastereoselective reductive aldol cyclization.
The first synthesis of the antitumorantibiotic guanine 7-oxide (VI) has been achieved via a 4-step route starting from phenacyl bromide (I) and the nitropyrimidone III and proceeding through the intermediates IVe and Ve.
A full account is given of the first chemical synthesis of the antitumor antibiotic guanine 7-oxide (5) and its9-substitutedderivatives (24a--k and 26). Coupling of appropriate primary amines (17a--e, g--k) with phenacyl bromide (16) produced, after treatment with HCl, the corresponding N-substituted phenacylamine hydrochlorides (18a--e, g--k). A similar phenacylation of 4-amino-l-butanol (21) failed
全面介绍了抗肿瘤抗生素鸟嘌呤7-氧化物(5)及其9-取代衍生物(24a-k和26)的首次化学合成。用HCl处理后,将适当的伯胺(17a-e,g-k)与苯甲酰溴(16)偶联,制得相应的N-取代的苯甲胺盐酸盐(18a-e,g-k)。4-氨基-1-丁醇(21)的类似苯甲酰化反应未能得到所需的化合物18f,因此将其与2-溴甲基-2-苯基-1,3-二氧戊环(20)在150-155摄氏度下加热在用HCl处理3小时后,提供氨基缩酮盐酸盐22,产率为40%。用热的2 N HCl水溶液对22进行缩酮化处理,得到18f,产率为96%。由盐酸盐18a-1和1N NaOH水溶液原位生成的游离碱的缩合,用氯嘧啶酮6在沸点EtOH水溶液中于沸点下进行20分钟或在25-30℃下进行3-24h,以54-90%的产率得到6-苯甲氨基-4-嘧啶酮19a-1。在室温下用2N NaOH水溶液处理10-60分钟后,硝基嘧啶酮19a
Purines. LXX. An Extension of the "Phenacylamine Route" to the Syntheses of the 7-N-Oxides of 6-Mercaptopurine and 6-Methylthiopurine, and Antileukemic Activity of Some Purine N-Oxides.
A full account is given of the first syntheses of 6-mercaptopurine 7-N-oxide (4) and 6-methylthiopurine 7-N-oxide (5). The synthesis of 4 followed a "phenacylamine route", which started from condensation of 4,6-dichloro-5-nitropyrimidine (15) with N-(4-methoxybenzyl)phenacylamine to form the phenacylaminopyrimidine derivative (11) and proceeded through conversion into the mercapto derivative, intramolecular