1: (methoxycarbonylmethyl)methyldiphenylphosphonium chloride With potassium hexamethylsilazane in tetrahydrofuran Wittig reaction; 1 h; Inert atmosphere; 2: 2-chloro-benzaldehyde in tetrahydrofuran T=-78°C; Wittig reaction; Inert atmosphereCooling with acetone-dry ice; optical yield given as percent dediastereoselective reaction;

1: (methoxycarbonylmethyl)methyldiphenylphosphonium chloride With sodium hexamethyldisilazane in tetrahydrofuran Wittig reaction; 1 h; Inert atmosphere; 2: benzaldehyde in tetrahydrofuran T=-78°C; Wittig reaction; Inert atmosphereCooling with acetone-dry ice; optical yield given as percent dediastereoselective reaction;

1: (methoxycarbonylmethyl)methyldiphenylphosphonium chloride With sodium hexamethyldisilazane in tetrahydrofuran Wittig reaction; 1 h; Inert atmosphere; 2: benzaldehyde in tetrahydrofuran T=-78°C; Wittig reaction; Inert atmosphereCooling with acetone-dry ice; optical yield given as percent dediastereoselective reaction;