Hydrogen bond donor solvents enabled metal and halogen-free Friedel–Crafts acylations with virtually no waste stream
作者:Guangchang Liu、Bo Xu
DOI:10.1016/j.tetlet.2018.01.026
日期:2018.3
halogen-free Friedel–Crafts acylation protocol with virtually no waste stream generation. We propose a hydrogen bonding donor solvent will form a hydrogen bonding network and may provide significant rate enhancement for Friedel–Crafts reactions. Trifluoroacetic acid is one of the strongest H-bonddonor solvents, which is also volatile and can be easily recovered by distillation without need for reaction workup
γγ-Disubstituted itaconic acids. Part IV. The Stobbe condensation of 6-benzoyltetralin and 2-benzoylnaphthalene with diethyl succinate
作者:W. I. Awad、F. G. Baddar、F. A. Fouli、S. M. A. Omran、M. I. B. Selim
DOI:10.1039/j39680000507
日期:——
The mixture of cis-(I) and trans-(Ph/CO2Et)-3-ethoxycarbonyl-4-phenyl-4-(6-tetralyl)but-3-enoic acid (VII) has been converted into ethyl 4-acetoxy-5,6,7,8-tetrahydro-1-phenylphenanthrene-2-carboxylate (IIa) and ethyl 4-acetoxy-1-(6-tetralyl)-2-naphthoate (VIIIa). The derived phenolic acids (IIb) and (VIIIb) were converted into methyl 4-methoxy-1-phenylphenanthrene-2-carboxylate (VIc), and 4-methox
的混合物的顺式- (I)和反式- (PH / CO 2 ET)-3-乙氧羰基-4-苯基-4-(6- tetralyl)丁-3-烯酸(VII)已被转化为乙基4-乙酰氧基5,6,7,8-四氢-1-苯基菲-2-羧酸酯(IIa)和4-乙酰氧基-1-(6-四烯丙基)-2-萘甲酸乙酯(VIIIa)。将衍生的酚酸(IIb)和(VIIIb)转化为4-甲氧基-1-苯基菲-2-羧酸甲酯(VIc)和4-甲氧基-1-(2-萘基)-2-萘甲酸(XIId) , 分别。后者被脱羧成4-甲氧基-1,2'-联萘基(XIIe)。顺式和反式的酸酐用氯化铝将-3-羧基-4-(6-四烯丙基)-4-苯基丁-3-烯酸异构化成相应的茚基乙酸(Ⅴ)和(XI),然后用乙酸钠在乙酸酐中环化。然后水解和甲基化得到相应的芴酮(IIIc)和(IXc),与通过环化(IIb)和(VIIIb)的甲基醚获得的芴酮相同。环化的顺式(PH / CO 2 ET)
Quinuclidine derivatives processes for preparing them and their uses as m2 and/or m3 muscarinic receptor inhibitors
申请人:Guyaux Michel
公开号:US20050020660A1
公开(公告)日:2005-01-27
The invention concerns quinuclidine derivatives of formula I or II wherein the substituents are as defined in the specification, as well as their use as pharmaceuticals. The compounds of the invention_show high affinities for m3 and/or m2 muscarinic receptors and are particularly suited for treating urinary incontinence.
Barrera i Costa, Annales de Chimie (Cachan, France), 1949, vol. <12> 4, p. 84,123
作者:Barrera i Costa
DOI:——
日期:——
Exploring naphthyl-carbohydrazides as inhibitors of influenza A viruses
作者:Sanmitra Barman、Lei You、Ran Chen、Vlad Codrea、Grace Kago、Ramakrishna Edupuganti、Jon Robertus、Robert M. Krug、Eric V. Anslyn
DOI:10.1016/j.ejmech.2013.10.063
日期:2014.1
A library of hydrazide derivatives was synthesized to target non-structural protein 1 of influenza A virus (NS1) as a means to develop anti-influenza drug leads. The lead compound 3-hydroxy-N-[(Z)-1-(5,6,7,8-tetrahydronaphthalen-2-yl)ethylideneamino]naphthalene-2-carboxamide, which we denoted as "HENC", was identified by its ability to increase the melting temperature of the effector domain (ED) of the NS1 protein, as assayed using differential scanning fluorimetry. A library of HENC analogs was tested for inhibitory effect against influenza A virus replication in MDCK cells. A systematic diversification of HENC revealed the identity of the R group attached to the imine carbon atom significantly influenced the antiviral activity. A phenyl or cyclohexyl at this position yielded the most potent antiviral activity. The phenyl containing compound had antiviral activity similar to that of the active form of oseltamivir (Tamiflu), and had no detectable effect on cell viability. (C) 2013 Elsevier Masson SAS. All rights reserved.