3-氨基-2,3-二氢-1 H-苯并[ f ]色烯和2-[((2-羟基萘-1-基)甲基] -2,3-二氢-1 H-苯并[ f ]色烯-2通过萘-2-醇曼尼希碱与β-氨基丙烯腈和3-吗啉代丙烯酸甲酯的反应得到β-腈,β-氨基丙烯腈是推挽式烯烃[4 + 2]环加成到相应的1,2-萘醌1-甲基化物的产物。3-氨基-3-苯基丙烯腈与曼尼希碱的反应导致形成1,4-二氢吡啶-3,5-二碳腈。
Process for the preparation of 2,5-disubstituted pyridines
申请人:Bayer Aktiengesellschaft
公开号:US05466800A1
公开(公告)日:1995-11-14
2,5-Disubstituted pyridines of the formula ##STR1## can be prepared by reacting enamines of the formula ##STR2## with .beta.-amino-acrylonitriles of the formula ##STR3## and treating the open-chain intermediate, which represents a R-R.sup.1 -5-amino-penta-2,4-dienonitrile, with protic acids or with ammonia.
Electrocyclization of Phosphahexatrienes: An Approach to λ<sup>5</sup>-Phosphinines
作者:Yurii V. Svyaschenko、Bogdan B. Barnych、Dmitriy M. Volochnyuk、Nadiya V. Shevchuk、Aleksandr N. Kostyuk
DOI:10.1021/jo200847r
日期:2011.8.5
We experimentally verified an assumption that the substitution of a carbon atom with a pentavalent phosphorus atom in 1-alkoxy (dialkylamino) hexatrienes will not hamper its ability to electrocyclize. A series of 1-, 3-, and 5-phosphahexatrienes were synthesized. It was shown that parent lambda(5)-phosphinines could be synthesized by electrocyclization of the 3- and 5-phosphahexatrienes. The resultant electrocyclization is a convenient method for the synthesis of parent lambda(5)-phosphinines bearing different substituents on the phosphorus atom.
FLUORINE-CONTAINING PYRAZOLECARBONITRILE DERIVATIVE AND METHOD FOR PRODUCING THE SAME, AND FLUORINE-CONTAINING PYRAZOLECARBOXYLIC ACID DERIVATIVE OBTAINED BY USING THE FLUORINE-CONTAINING PYRAZOLECARBONITRILE DERIVATIVE AND METHOD FOR PRODUCING THE SAME