不引起耐药性的抗微生物剂的发现和开发仍然是一个持续的挑战。我们在这方面的努力继续揭示出具有不同理化性质的新的潜在治疗剂,同时保留了有效的N,N-二氯胺药效基团作为关键的抗菌战斗部。在这封信中,我们公开了含有多元醇单元作为水溶性基团的试剂。这些磺酰基-多元醇剂显示出广谱的杀菌和杀病毒活性。这些化合物在中性pH值下对大肠杆菌的1h MBC值为16–512μg/ mL,对金黄色葡萄球菌为4–256μg/ mL ,1-h IC 50对腺病毒5的抗药性为4.5–32μM,对单纯疱疹病毒1的抗药性为0.7–3.0μM。先导化合物在组织培养物刺激性试验中进行测试,在测试的最高浓度下仅表现出最小的刺激性。
Novel ring-opening of epoxides and oxetanes with POCl3 or PCl3 in the presence of DMAP
摘要:
Efficient synthesis of chlorohydrins by cleavage of oxiranes and oxetanes using POCl3 or PCl3 in the presence of DMAP (4-N,N-dimethylaminopyridine) has been studied. (C) 2001 Elsevier Science Ltd. All rights reserved.
product. Various new cis- and trans-1-(teri-butylamino)-2-benzyl- 2-methylcyclopropane-carbonitriles and the corresponding cyclopropanecarboxamides have been synthesized, with focus on the isolation of the pure stereoisomeric cyclopropanecarboxamides. The relative configuration of the stereoisomers was established by X-ray crystallographic analysis of one of the model compounds. A new route to the latter
2-氨基-4-氯-3,3-二甲基丁腈与叔丁醇钾在THF中的直接环化得到1-氨基-2,2-二甲基环丙烷-1-腈和二聚产物。已经合成了各种新的顺式和反式 1-(叔丁基氨基)-2-苄基-2-甲基环丙烷甲腈和相应的环丙烷甲酰胺,重点是纯立体异构环丙甲酰胺的分离。立体异构体的相对构型是通过一种模型化合物的 X 射线晶体学分析建立的。通过 1-甲氧基环丙胺与氰化钾的反应,开发了获得后者官能化环丙烷的新途径。报道了通过 Favorskii 衍生的中间体将 1-氨基环丙烷-1-腈重排为氮杂环丁烷和恶嗪衍生物的一些显着重排。
Design, Synthesis, and Evaluation of Orally Active 4-(2,4-Difluoro-5-(methoxycarbamoyl)phenylamino)pyrrolo[2,1-<i>f</i>][1,2,4]triazines as Dual Vascular Endothelial Growth Factor Receptor-2 and Fibroblast Growth Factor Receptor-1 Inhibitors
作者:Robert M. Borzilleri、Xiaoping Zheng、Ligang Qian、Christopher Ellis、Zhen-wei Cai、Barri S. Wautlet、Steve Mortillo、Robert Jeyaseelan,、Daniel W. Kukral、Aberra Fura、Amrita Kamath、Viral Vyas、John S. Tokarski、Joel C. Barrish、John T. Hunt、Louis J. Lombardo、Joseph Fargnoli、Rajeev S. Bhide
DOI:10.1021/jm0501275
日期:2005.6.1
A series of substituted 4-(2,4-difluoro-5-(methoxycarbamoyl)phenylamino)pyrrolo[2,1-f][1,2,4]triazines was identified as potent and selective inhibitors of the tyrosine kinase activity of the growth factor receptors VEGFR-2 (Flk-1, KDR) and FGFR-1. The enzyme kinetics associated with the VEGFR-2 inhibition of compound 50 (K(i) = 52 +/- 3 nM) confirmed that the pyrrolo[2,1-f][1,2,4]triazine analogues
Analyzing Site Selectivity in Rh<sub>2</sub>(esp)<sub>2</sub>-Catalyzed Intermolecular C–H Amination Reactions
作者:Elizabeth N. Bess、Ryan J. DeLuca、Daniel J. Tindall、Martins S. Oderinde、Jennifer L. Roizen、J. Du Bois、Matthew S. Sigman
DOI:10.1021/ja5015508
日期:2014.4.16
Predicting site selectivity in C–H bond oxidation reactions involving heteroatom transfer is challenged by the small energetic differences between disparate bond types and the subtle interplay of steric and electronic effects that influence reactivity. Herein, the factorsgoverningselective Rh2(esp)2-catalyzed C–H amination of isoamylbenzene derivatives are investigated, where modification to both
pattern of the reactant. Inter alia they undergo surprising tandem sigmatropic rearrangements and cycloadditions. Three heretofore unknown product types were isolated and fully characterized: 6,7-dithiabicyclo[3.1.1]heptan-2-one 6-oxide derivatives, two isomeric 1,2-dithiete 1,1-dioxides (α,β-unsaturated four-membered cyclic thiosulfonates) from bis(propargyloxy) disulfides with α- or γ-alkyl-substituted
Development of Zn-ProPhenol-Catalyzed Asymmetric Alkyne Addition: Synthesis of Chiral Propargylic Alcohols
作者:Barry M. Trost、Mark J. Bartlett、Andrew H. Weiss、Axel Jacobi von Wangelin、Vincent S. Chan
DOI:10.1002/chem.201202085
日期:2012.12.14
The development of a general and practical zinc‐catalyzed enantioselective alkyneaddition methodology is reported. The commercially available ProPhenol ligand (1) has facilitated the addition of a wide range of zinc alkynylides to aryl, aliphatic, and α,β‐unsaturated aldehydes in high yield and enantioselectivity. New insights into the mechanism of this reaction have resulted in a significant reduction