Abstract:
The uncatalyzed addition of N-(tert-butoxycarbonyl)-2--tert-butyldimethylsilyloxypyrrole 3 to 1,4-quinoties bearing all electron withdrawing group at C-2 is reported. Use of 2-methoxycarbonyl-1,4-benzoquinone 4 and 2-methoxycarbonyl-1.4-naphthoquinon