Ring transformation and reactions of 2-amino-4,5-dihydrofuran-3,4-dicarbonitriles
作者:Vicente J. Arán、Miguel A. Pérez、José L. Soto
DOI:10.1039/p19840002009
日期:——
The 2-amino-4,5-dihydrofuran-3,4-dicarbonitriles (1a–f) were thermally aromatized to the 2-aminofuran-3-carbonitriles (2a–f) which, in turn, underwent photoxidative ring transformation into the 2,5-dihydro-5-hydroxy-2-oxopyrrole-3-carbonitriles (3b–e). Mild acidic hydrolysis of the 2-amino-4,5-dihydrofuran-3,4-dicarbonitriles (1a–g) led to the tetrahydro-2-oxofuran-3,4-dicarbo-nitriles (4a–g). The
将2-氨基-4,5-二氢呋喃-3,4-二腈(1a – f)热芳香化为2-氨基呋喃-3-腈(2a – f),然后将其进行光氧化环转化为2 ,5-二氢-5-羟基-2-氧代吡咯-3-甲腈(3b – e)。2-氨基-4,5-二氢呋喃-3,4-二腈(1a – g)的轻度酸性水解导致四氢-2-氧呋喃-3,4-二苯并腈(4a – g)。将代表性化合物(4a)转化为2,5-二氢-2-氧呋喃-3-腈(5)或进一步转化为3,3a-二氢呋喃[3,4- c ]吡咯-1,4,6-三酮(6)。