Topochemistry. Part XXXI. Formation of cyclo-octa-1,5-cis,cis-dienes from 1,4-disubstituted s-trans-butadienes in the solid state. A contribution to the problem of C4-versus C8-cyclodimerisation
作者:B. S. Green、M. Lahav、G. M. J. Schmidt
DOI:10.1039/j29710001552
日期:——
Solid penta-1,3-diene-1-carboxylic acid (4), penta-1,3-diene-1-carboxamide (5), buta-1,3-diene-1,4-dicarbonitrile (6), styrylacrylic acid (10), its methyl ester (46), and amide (49)(all trans,trans-configurated), all photodimerise on irradiation (λ > 290 nm), to divinylcyclobutane (C4) derivatives. The structures of the fully characterised photoproducts from (4), (5), (6), and (49) and the light-stability
固体1,5-3-二烯-1-羧酸(4),-1,3-二烯-1-羧酰胺(5),-1,3-二烯-1,4-二腈丁酯(6),苯乙烯基丙烯酸酸(10),其甲酯(46)和酰胺(49)(全部为反式,反式构型),均在照射(λ> 290 nm)后全部光二聚为二乙烯基环丁烷(C 4)衍生物。(4),(5),(6)和(49)的完全表征的光产物的结构和(N-苯基)苯乙烯基丙烯酰胺(53)的光稳定性可从已知或假定的包装方式中预测他们的单体。