Efficient Route for the Synthesis of Diverse Heteroannelated 5-Cyanopyridines
作者:Dmitriy M. Volochnyuk、Sergey V. Ryabukhin、Andrey P. Mityuk、Andrii Hrebonkin、Pavlo S. Lebed、Galyna P. Grabchuk
DOI:10.1055/a-1360-9852
日期:2021.6
The new efficient, convenient protocol for the synthesis of heteroannelated 3-cyanopyridines and pyrimidines starting from diverse aminoheterocycles and 3,3-dimethoxy-2-formylpropionitrile sodium salt was elaborated. The advantages and improvements of the procedure compared to previously known methods are shown. The scope and limitations of the method are determined. The impact of the structural features
6-[(Dimethylamino)methylene]amino-1,3-dimethyluracil: A versatile aza-diene substrate for cycloaddition and michael-type reactions
作者:Eileen B. Walsh、Zhu Nai-Jue、Guo Fang、Heinrich Wamhoff
DOI:10.1016/s0040-4039(00)80505-5
日期:1988.1
6-[(Dimethylamino)methylene]amino-1,3-dimethyluracil 1 undergoes formal [4+2] cycloadditionreactions with electron deficient olefins to give pyrido[2,3-d]pyrimidines. With DMAD or azodicarboxylates Michael addition occurs leading to pyrrolo[3,4-c]pyridines (X-ray analysis) and theophylline derivatives.
Synthesis of Pyrido[2,3-d]pyrimidines via Palladium-catalyzed Coupling Reaction Followed by Electrocyclic Reaction
作者:Sung Hoon Kim、Kee Yoon Rho、Joong Hyup Kim、Cheol Min Yoon
DOI:10.3987/com-98-8295
日期:——
Novel Synthesis of Pyrido[3,4-d]pyrimidines, Pyrido[2,3-d]pyrimidines, and Quinazolines via Palladium-catalyzed Oxidative Coupling
作者:Kosaku Hirota、Hideki Kuki、Yoshifumi Maki
DOI:10.3987/com-93-s99
日期:——
Oxidative-coupling of 6-azavinyl(or vinyl)-1,3-dimethyluracil derivatives (1, 5, and 7) with electron-deficient olefins in the presence of palladium acetate led to the formation of the corresponding 6-substituted pyrido[3,4-d]pyrimidines (4), pyrido[2,3-d]pyrimidines (6), and quinazolines (8 and 9), respectively, via an intermediacy of azatriene.
Hirota Kosaku, Kuki Hideki, Maki Yoshifumi, Heterocycles, 37 (1994) N 1, S 563-570