烷基和芳基格氏试剂通过加成1,4-与环状β-烷氧基-α,β-不饱和三氟甲基酮反应生成主要产物,例如,顺式-2,3-二取代的四氢吡喃。在大多数例子中,开环导致作为次要产物的重排半酮的立体选择性形成。在其他条件下,带有2,2,2-三氟-1-(2-乙氧基-3,4-二氢-2 H -5-吡喃基)-1-乙酮的立体选择开环会生成无环醛,作为次要产物,并通过通过添加更多当量的格利雅试剂,是通往一系列二醇的主要途径。在较高温度下不存在其他格氏试剂的情况下,内部氢化物转移可提供无环酯。
A comparative study using conventional methods, ionic liquids, microwave irradiation and combinations thereof for the synthesis of 5-trifluoroacetyl-1,2,3,4-tetrahydropyridines
作者:Valquiria P. Andrade、Mateus Mittersteiner、Márcio M. Lobo、Clarissa P. Frizzo、Hélio G. Bonacorso、Marcos A.P. Martins、Nilo Zanatta
DOI:10.1016/j.tetlet.2018.01.059
日期:2018.3
This study reports a comparison between conventionalmethods, ionic liquids, microwave (MW) irradiation, and combinations thereof for the synthesis of a series of fourteen 1-aryl-2-arylamino-5-trifluoroacetyl-1,2,3,4-tetrahydropyridines. In all of the reactions tested, the products were obtained at very good yields (87–97%), but the reaction times were very different, depending on the methodused. Comparing
An Efficient Synthesis of Oxa- and Aza-Condensed Tetrahydropyridines from Cyclic Enones
作者:Nilo Zanatta、Liana da Fernandes、Sinara München、Helena Coelho、Simone Amaral、Leonardo Fantinel、Hélio Bonacorso、Marcos Martins
DOI:10.1055/s-0029-1218779
日期:2010.7
A simple and efficient one-pot synthesis of tetrahydrooxazolo[3,2-a]pyridines and hexahydroimidazo[1,2-a]pyridines, and some related oxa- and aza-condensed tetrahydropyridines, from the reaction of 2-alkoxy-5-(trifluoroacetyl)-2,3-dihydro-2H-pyrans (cyclic enones) with amino alcohols and primary diamines, is reported. Products were isolated with highpurity and in very good yields. tetrahydropyridines
一种简单有效的一锅合成方法,是通过2-烷氧基-5-的反应合成四氢恶唑并[3,2- a ]吡啶和六氢咪唑并[1,2- a ]吡啶,以及一些相关的氧杂和氮杂缩合的四氢吡啶。报道了具有氨基醇和伯二胺的(三氟乙酰基)-2,3-二氢-2 H-吡喃(环状烯酮)。分离出的产品具有很高的纯度,并且产率很高。 四氢吡啶-恶唑烷吡啶-咪唑并吡啶-二氢吡喃-环烯酮
Synthesis of 1-Arylethyl-2-arylethylamino-5-trifluoroacetyl-1,2,3,4-tetrahydropyridines and Related Compounds with Potential Cell Efflux Pump Inhibition
作者:Nilo Zanatta、Marcio M. Lobo、Josiane M. dos Santos、Laura de A. Souza、Valquiria P. de Andrade、Helio G. Bonacorso、Marcos A. P. Martins
DOI:10.1002/jhet.2271
日期:2015.11
This study reports a simple, fast, and efficient method for the synthesis of a new series of 1‐arylethyl‐2‐arylethylamino‐5‐trifluoroacetyl‐1,2,3,4‐tetrahydropyridines and relatedcompounds from the reaction of 2‐alkoxy‐5‐trifluoroacetyl‐3,4‐dihydro‐2H‐pyrans with 2‐arylethanamines and related 2‐ethanamines. The desired tetrahydropyridines were obtained in excellent yields (90–98%), through a reaction
Reaction of Benzyl Grignard Reagents with Trifluoroacetyldihydropyrans and Other Cyclic β-Alkoxy-α,β-Unsaturated Trifluoromethylketones
作者:Simon J Coles、John M Mellor、Afaf H El-Sagheer、Ezz El-Din M Salem、Reda N Metwally
DOI:10.1016/s0040-4020(00)00976-5
日期:2000.12
Benzyl Grignard reagents react with cyclic β-alkoxy-α,β-unsaturated trifluoromethyl ketones by 1,2-addition to afford unsaturated allylic alcohols in high yield. The factors determining the balance between 1,2- and 1,4-addition to unsaturated ketones are discussed. The structures of major and minor products are established by single crystal X-ray diffraction studies.
Highly Chemoselective Synthesis of 6-Alkoxy-1-alkyl(aryl)-3-trifluoroacetyl-1,4,5,6-tetrahydropyridines and 1-Alkyl(aryl)-6-amino-3-trifluoroacetyl-1,4,5,6-tetrahydropyridines
作者:Nilo Zanatta、Liana da S. Fernandes、Fabiane M. Nachtigall、Helena S. Coelho、Simone S. Amaral、Alex F. C. Flores、Helio G. Bonacorso、Marcos A. P. Martins
DOI:10.1002/ejoc.200801119
日期:2009.3
method for the synthesis of a large series of novel 6-alkoxy-1-alkyl(aryl)-3-trifluoroacetyl-1,4,5,6-tetrahydropyridines and 1-alkyl(aryl)-6-amino-3-trifluoroacetyl-1,4,5,6-tetrahydropyridines, from the reaction of 6-alkoxy-3-trifluoroacetyl-4,5-dihydro-6H-pyrans with primary alkyl and arylamines, in good yields, is reported. Preliminary in vitro antimicrobial activity of the 1-alkyl(aryl)-6-amino-3-trifluoroacetyl-1