Compounds of the general formula
A - B
where A is a carboxylic acid group having a carbon chain of 3-10 carbon atoms and preferably being branched, and which includes one or more oxo groups, and B is hydrogen, a pharmaceutically acceptable metal atom, an alcohol bound as ester and having 1-5 carbon atoms and 1-3 hydroxy groups, or a glycerol group bound as ester, can be used as a nutrient substrate, an antimicrobial and antiviral agent, and/or as an agent for influencing the central nervous system.
The invention also relates to compositions intended for the aforementioned usages and containing at least one compound A - B.
一般公式为 A - B 的化合物
其中 A 是一个具有 3-10 个碳原子的碳链的羧酸基团,最好是分支的,并且包括一个或多个氧代基团,B 是氢,一种药物上可接受的金属原子,一个作为酯键合的醇,有 1-5 个碳原子和 1-3 个羟基,或一个作为酯键合的甘油基团,可以用作营养底物,抗菌和抗病毒剂,以及/或作为影响中枢神经系统的剂。
该发明还涉及旨在上述用途并含有至少一个化合物 A - B 的组合物。
Asymmetric Aza-Wacker-Type Cyclization of <i>N</i>-Ts Hydrazine-Tethered Tetrasubstituted Olefins: Synthesis of Pyrazolines Bearing One Quaternary or Two Vicinal Stereocenters
aza-Wacker-type cyclization of N-Ts hydrazine-tethered tetrasubstituted olefins, affording optically active pyrazolines bearing chiral tetrasubstituted carbon stereocenters. This reaction is tolerant to a broad range of substrates under mild reaction conditions, giving the desired chiral products with high enantioselectivities. Generation of two vicinal stereocenters on the C═C double bonds was also achieved
Highly C-selective difluoromethylation of β-ketoesters by using TMSCF<sub>2</sub>Br/lithium hydroxide/<i>N</i>,<i>N</i>,<i>N</i>-trimethylhexadecan-1-ammonium bromide
作者:Jiandong Wang、Etsuko Tokunaga、Norio Shibata
DOI:10.1039/c8cc05135f
日期:——
The highly C-selective difluoromethylation of β-ketoesters was achieved by combining TMSCF2Br/LiOH/N,N,N-trimethylhexadecan-1-ammonium bromide. Compared to other alkali metal salts or organicbases, lithiumhydroxide, which served as a difluorocarbene activator from TMSCF2Br, was crucial in the control of high C/O regioselectivity.
A decarboxylativeintramolecularaziridination reaction of alkene‐tethered 4H‐isoxazol‐5‐ones with a palladium/phosphine catalyst gave 1‐azabicyclo[3.1.0]hex‐2‐enes in moderate to high yields (see scheme; dba=dibenzylideneacetone). The resulting N‐fused bicyclic aziridines readily reacted with various reagents to afford ring‐opening pyrroline derivatives.
A double Mannich approach to the synthesis of substituted piperidones—application to the synthesis of substituted E-ring analogues of methyllycaconitine
作者:Yinman Chan、Jared Balle、J. Kevin Sparrow、Peter D.W. Boyd、Margaret A. Brimble、David Barker
DOI:10.1016/j.tet.2010.06.084
日期:2010.8
The double Mannich reaction of acyclic α,γ-substituted β-keto esters and bis(aminol) ethers gives substituted 3,5-substituted-4-piperidones with high levels of diastereoselectivity. These piperdiones can be easily transformed into substituted E-ring analogues of the delphinium alkaloid methyllycacotine.