Neighboring effect of pyrazole rings: regio- and stereoselective Wagner–Meerwein rearrangement in electrophilic addition reactions of norbornadiene-fused pyrazoles
作者:Tomoshige Kobayashi、Yosuke Uchiyama
DOI:10.1039/b002454f
日期:——
The electrophilic additionreactions of norbornadiene-fused pyrazoles with bromine or p-nitrobenzenesulfenyl chloride provided the skeletally rearranged adducts regio- and stereoselectively probably via the neighboring group participation of a pyrazole ring accompanied by the formation of a bridged pyrazolium ion.
Synthesis and structures of pyrroles fused with rigid bicyclic ring systems at β-positions†
作者:Hidemitsu Uno、Satoshi Ito、Mitsuo Wada、Hikaru Watanabe、Miho Nagai、Akiko Hayashi、Takashi Murashima、Noboru Ono
DOI:10.1039/b006584f
日期:——
Pyrroles fused with bicyclo[2.2.2]octene and bicyclo[2.2.1]heptene frameworks are prepared by a modified Barton–Zard method. Structures of these pyrroles and thermal behaviours of the former pyrroles are studied by X-ray and DSC analyses.