Syntheses and Spectral Properties of Norbornadiene-Fused Heterocycles: 1,3-Diphenyl-4,7-dihydro-4,7-methanobenzo[c]thiophene, -4,7-methano-2H-isoindole, and -4,7-methanoisobenzofuran
摘要:
介绍了一种新型二苯基取代噻吩、吡咯和呋喃在 3 和 4 位与降冰片二烯融合的合成方法。通过与环己烯融合衍生物的光谱特性进行比较,讨论了这些分子的结构。降冰片二烯融合噻吩的单晶 X 射线结构分析以及相关化合物的 PM3 计算显示,降冰片二烯融合杂环的环连接处碳原子的键角是扭曲的。
Neighboring Group Participation by Heteroaromatic Rings: The Wagner–Meerwein Type Skeletal Rearrangement in the Electrophilic Addition Reactions of Norbornadiene-Fused Furans, Pyrroles, and Thiophenes
作者:Tomoshige Kobayashi、Takeo Tsuzuki、Mayu Saitoh
DOI:10.1246/bcsj.72.1597
日期:1999.7
The electrophilic addition reactions of norbornadiene-fused furans, pyrroles, and thiophenes with bromine, arenesulfenyl chlorides, or a triazoledione generally afforded skeletally rearranged adducts except for a dibenzoyl-substituted thiophene. The formations of the adducts are attributable to the neighboringgroupparticipation by five-membered heteroaromatic rings, accompanied by the formations
Syntheses and Spectral Properties of Norbornadiene-Fused Heterocycles: 1,3-Diphenyl-4,7-dihydro-4,7-methanobenzo[<i>c</i>]thiophene, -4,7-methano-2<i>H</i>-isoindole, and -4,7-methanoisobenzofuran
The syntheses of a novel diphenyl-substituted thiophene, pyrrole, and furan fused at the 3- and 4-positions with norbornadiene are described. Structures of these molecules are discussed on the basis of spectral properties by comparison with those of cyclohexene-fused derivatives. Single crystal X-ray structural analysis of the norbornadiene-fused thiophene as well as the PM3 calculations of the related compounds revealed that the bond angles of carbon atoms at the ring-junction of norbornadiene-fused heterocycles are distorted.
介绍了一种新型二苯基取代噻吩、吡咯和呋喃在 3 和 4 位与降冰片二烯融合的合成方法。通过与环己烯融合衍生物的光谱特性进行比较,讨论了这些分子的结构。降冰片二烯融合噻吩的单晶 X 射线结构分析以及相关化合物的 PM3 计算显示,降冰片二烯融合杂环的环连接处碳原子的键角是扭曲的。