Reaction of Terminally Alkyl-Substituted Oxy Dienes with Tetracyanoethylene and Other Acceptors
作者:Donald W. Cameron、Ross M. Heisey
DOI:10.1071/ch00035
日期:——
dienes (4), (19) and (20) did not undergocycloaddition to 1,4-quinonoid dienophiles, for steric reasons, but allreacted with tetracyanoethylene to give [4+2]- or[2+2]-adducts. Unlike the 1-oxy diene (4), the 2- and 3-oxysystems (19) and (20) did not show hydrogen-transfer chemistry towardsquinones. The individual components of isomeric pairs of dienes (8), (9) and(19), (21) were differentiated by differing
4,4-二甲基取代的氧化二烯 (4), (19) 和 (20) 由于空间原因没有与 1,4-醌类二烯体发生环加成反应,而是与四氰基乙烯反应生成 [4+2]- 或 [ 2+2]-加合物。与 1-氧二烯 (4) 不同,2-和 3-氧系统 (19) 和 (20) 没有显示出对醌的氢转移化学。通过对环加成的不同反应性来区分二烯异构体对(8)、(9)和(19)、(21)的各个组分。