Process for preparing cyano derivatives of tetrahydroquinolines and
申请人:John Wyeth & Brother Limited
公开号:US04529798A1
公开(公告)日:1985-07-16
Fused carbocyclic ring derivatives of pyridine which contain a nitrile or thioamide group on the carbocyclic ring e.g. 8-cyano or thiocarboxamido-5,6,7,8-tetrahydroquinolines are prepared by a process in which a sodium, potassium, lithium or magnesium halide derivative of the pyridine compound is treated with a compound RaRbNCN wherein Ra and Rb are the same or different and represent alkyl, cycloalkyl, or aralkyl, or Ra and Rb are joined to form a heterocyclic ring with the nitrogen, and the product is treated with a proton source to obtain the nitrile which is optionally treated with a sulphurizing agent to form the thioamide. The nitriles or thioamides may be isolated as their acid addition salts.
Functionalization of tetra- and octahydroacridine derivatives through Michael addition
作者:Ekaterina V. Zaliznaya、Oleg K. Farat、Svetlana A. Varenichenko、Alexander V. Mazepa、Victor I. Markov
DOI:10.1016/j.tetlet.2016.06.096
日期:2016.8
octahydroacridine derivatives has been achieved using a Michael-type reaction with N-arylmaleimides. This method enables the facile synthesis of biologically important N-aryl or NH pyrrolidine-2,5-diones bearing tetra- or octahydroacridine moieties in a single step with high yields. The reactions of octahydroacridine-4-carboxamide with N-arylmaleimides react further to afford rearrangement products.
Fused carbocyclic ring derivatives of pyridine which contain a nitrile or thioamide group on the carbocyclic ring e.g. 8-cyano or thiocarboxamido-5,6,7,8-tetrahydro- quinolines are prepared by a process in which a sodium, potassium, lithium or magnesium halide derivative of the pyridine compound is treated with a compound RaRbNCN wherein Ra and Rb are the same or different and represent alkyl, cycloalkyl, or aralkyl, or Ra and Rb are joined to form a heterocyclic ring with the nitrogen, and the product is treated with a proton source to obtain the nitrile which is optionally treated with a sulphurising agent to form the thioamide. The nitriles or thioamides may be isolated as their acid addition salts.
在碳环上含有腈基或硫酰胺基团的吡啶碳环衍生物,例如8-氰基或硫代羧酰胺基-5,6,7,8-四氢-喹啉的制备方法是:将吡啶化合物的钠、钾、锂或镁卤化物衍生物与化合物 RaRbNCN 一起处理,其中 Ra 和 Rb 可以相同或不同,代表烷基、环烷基或芳烷基,或 Ra 和 Rb 代表环烷基或芳烷基、环烷基或芳烷基,或者 Ra 和 Rb 与氮连接形成杂环,然后用质子源处理产物,得到腈,再用硫化剂处理形成硫代酰胺。腈或硫代酰胺可以作为它们的酸加成盐分离出来。
Reactivity of Substituted 2-Spiropyrimidin-4-Ones Under Vilsmeier–Haack Conditions
作者:S. A. Varenichenko、O. K. Farat、V. I. Markov
DOI:10.1007/s10593-014-1626-9
日期:2015.2
Substituted 2-spiropyrimidin-4-ones are formylated at room temperature under the conditions of the Vilsmeier-Haack reaction. When cautiously heated they undergo electrophilic rearrangement.
Rearrangement of 5’,6’,7’,8’-tetrahydro-1’H-spiro(cyclohexane-1,2’-quinazolin)-4’(3’H)-one during the Vilsmeier reaction
作者:Victor I. Markov、Oleg K. Farat、Svetlana A. Varenichenko、Ekaterina V. Velikaya
DOI:10.1016/j.mencom.2012.03.017
日期:2012.3
Treatment of 5,6',7',8'-tetrahydro-1'H-spiro(cyclohexane-1,2'-quinazolin)-4'(3'H)-one with POCl3 and DMF gives a mixture of 1,2,3,4,5,6,7,8-octahydroacridine-4-carbonitrile and 4,5-diformyl-2,3,6,7,8,10-hexahydroacridine-8a(1H)-carbonitrile, both products resulting from cascade transformations of the primary Vilsmeier intermediates.