1: C6H12ClO(1-)*Cl(1-)*Mg(2+) With magnesium in tetrahydrofuran T=67 - 68°C; 2: 1,4E-hexadien-3-yl isobutyrate With LiCuBr2 in tetrahydrofuran T=25 - 30°C; Grignard Reaction; 3: With water; citric acid in tetrahydrofuran