1.1: 7.7 g / Et3N / CH2Cl2 2.1: Mg; I2 / tetrahydrofuran / Heating 2.2: tetrahydrofuran / Heating View Scheme

1.1: oxalyl chloride / CH2Cl2 / 5 h 2.1: 7.7 g / Et3N / CH2Cl2 3.1: Mg; I2 / tetrahydrofuran / Heating 3.2: tetrahydrofuran / Heating View Scheme

1: 1-Bromo-3-methyl-3-butene With iodine; magnesium in tetrahydrofuran Heating; 2: N-methoxy-N-methyl-3-phenyl-propionamide in tetrahydrofuran Heating;