Cycloaddition reactions. Thermal addition of dimethyl acetylenedicarboxylate to 1-methoxyindene
作者:Terrence W. Doyle
DOI:10.1139/v70-268
日期:1970.6.1
The cycloaddition of 1-methoxyindene 2 to dimethyl acetylenedicarboxylate to form a fused cyclobutene system 3 is discussed. Photochemical ring enlargement of 3 leads to a benzocycloheptatriene system 5 while reduction yields a dihydro derivative 4. Saponification of 3 followed by photochemical ring expansion yields the diacid 7 which is subsequently hydrolyzed and decarboxylated to ketoacid 8.
讨论了 1-甲氧基茚 2 与乙炔二甲酸二甲酯的环加成反应形成稠合环丁烯系统 3。3 的光化学环扩大导致苯并环庚三烯系统 5,而还原产生二氢衍生物 4。 3 皂化,然后光化学扩环产生二酸 7,随后水解并脱羧为酮酸 8。