Azomalonate Syntheses Part II. Synthesis and Reactivity of Novel 1,2,4-Triazin-5-one Derivatives
作者:Roland Heckendorn
DOI:10.1002/hlca.19900730615
日期:1990.9.19
the corresponding triazine-5,6-diones, the outcome of the reduction is strongly dependent on the nature of the substituent at C(4). Bromination followed by aqueous workup leads to the 6-hydroxy derivatives. Some mechanistic aspects of this novel triazinone synthesis are discussed.
衍生自N-取代的(2-氯乙酰胺基)丙二酸二烷基偶氮丙二酸酯的碱处理导致形成4-取代的5-氧代-1,4,5,6-四氢-1,2,4-三嗪-3-羧酸烷基酯。相同的丙二酸酯与重氮化的2-氨基-5-氯二苯甲酮或邻氨基苯甲酸甲酯偶合,得到三嗪酮,其可以环化成新的三嗪并[1,6- a ]吲哚。两个代表性的杂环的特征还在于典型的反应。氧化产生相应的三嗪-5,6-二酮,还原的结果强烈取决于C(4)上取代基的性质。溴化之后进行水后处理,产生6-羟基衍生物。讨论了这种新颖的三嗪酮合成的一些机理方面。
General Ir-Catalyzed N–H Insertions of Diazomalonates into Aliphatic and Aromatic Amines
作者:Zhuang Zhong、Céline Besnard、Jérôme Lacour
DOI:10.1021/acs.orglett.3c03929
日期:2024.2.9
reactivity of acceptor–acceptor diazo malonate reagents is reported using [Ir(cod)Cl]2 as catalyst. A large range of amines, primary and secondary, aliphatic and aromatic, is possible. Mild temperatures, perfect substrate/reactant stoichiometry, and good functional group compatibility render the process particularly attractive for the (late-stage) functionalization of amines.