Norbornadiene-Fused Heterocycles: Syntheses and Cycloaddition Reactions of 2-Aryl-4,7-dihydro-4,7-methano-2<i>H</i>-isoindoles and 4,7-Dihydro-4,7-methanoisobenzofuran
作者:Tomoshige Kobayashi、Hirokazu Suda、Hiroki Takase、Ryozo Iriye、Hiroshi Kato
DOI:10.1246/bcsj.68.3269
日期:1995.11
previous claim of the synthesis of methanoisoindole derivatives was incorrect. 4,7-Dihydro-4,7-methanoisobenzofuran was prepared by the reduction of the norbornadiene-monocarbaldehyde with sodium borohydride and subsequent treatment with Amberlyst-15. The p-tolylmethanoisoindole reacted with dimethyl acetylenedicarboxylate to give a novel 1 : 3 adduct. On the other hand, in the reaction of the methanoisobenzofuran
2-苯基-和2-(对甲苯基)-4,7-二氢-4,7-甲氧基-2H-异吲哚通过处理3-(二乙氧基甲基)双环[2.2.1]庚-2,5-合成二烯-2-甲醛与苯胺或对甲苯胺,然后用硼氢化钠还原和酸催化环化。结论是先前关于合成甲异吲哚衍生物的主张是不正确的。4,7-二氢-4,7-甲氧基异苯并呋喃是通过用硼氢化钠还原降冰片二烯-单甲醛并随后用Amberlyst-15处理来制备的。对甲苯基甲烷异吲哚与乙炔二甲酸二甲酯反应得到一种新的 1:3 加合物。另一方面,在甲异苯并呋喃与 N-苯基马来酰亚胺的反应中,Diels-Alder 环加合物发生自发氧化,仅生成其环氧化物。