抄録
Cycloaddition of cyano-2(1H)-pyridones bearing a bromo or a nitro group at the pyridone ring with 2,3-dimethyl-1,3-butadiene carried out. Cycloaddition of 5-bromo-4-cyanopyridone gave cis- and trans-cycloadducts (isoquinolone derivative) in total yields 65%. The same reaction of 5-cyano-3-nitropyridone afforded 4-cyanodihydroisoquinolone (44%) and 4-cyanoisoquinolone (15%).
共有