1: 2-oxopropionitrile With n-butyllithium; diisopropylamine in tetrahydrofuran T=-78°C; 2: 1-(methoxycarbonyl)-1-methylcyclopropane in tetrahydrofuran T=-78 - 20°C;

1: acetonitrile With n-butyllithium; diisopropylamine in tetrahydrofuran T=-78°C; 1 h; 2: 1-(methoxycarbonyl)-1-methylcyclopropane in tetrahydrofuran T=-78 - 20°C; 1 h;

1: acetonitrile With sodium hydride in tetrahydrofuran T=20°C; 0.166667 h; 2: 1-(methoxycarbonyl)-1-methylcyclopropane in tetrahydrofuran 3 h; Heating / reflux; Product distribution / selectivity;