Three-Component Coupling of Aromatic Aldehydes, 1-Morpholino-2-nitroalkenes, and 3-Aminoazoles via Boron Trifluoride Etherate Catalysis: Reaction Pathway and Features of the Formation of Intermediates
作者:Daniil N. Lyapustin、Evgeny N. Ulomsky、Timur O. Zanakhov、Vladimir L. Rusinov
DOI:10.1021/acs.joc.9b02286
日期:2019.12.6
4,7-Dihydro-6-nitro-7-Ar-5-R-azolo[1,5-a]pyrimidines were obtained by the multicomponent reaction of aminoazoles, morpholino-nitroalkenes, and aromatic aldehydes in the catalysis of boron trifluoride etherate. The optimal reaction conditions were determined, and the formation of the target regioisomer was demonstrated. The pathway for multicomponent transformation, including the formation of azolyl-nitroalkene
通过氨基唑,吗啉代-硝基烯烃和芳香醛的多组分反应在三氟化硼醚化物的催化反应中获得了4,7-二氢-6-硝基-7-Ar-5-R-氮杂[1,5-a]嘧啶。确定了最佳反应条件,并证明了目标区域异构体的形成。确定了多组分转化的途径,包括形成偶氮基-硝基烯烃。假定在三氟化硼醚化物的催化过程中,吗啉代-硝基烯烃会转化为相应的硝基炔。对于与4-硝基苯甲醛的多组分反应,已经提出了排除形成侧区域异构体的条件。