1: P-ethyl-P-phenyldibenzophospholium bromide With potassium hexamethylsilazane in tetrahydrofuran Wittig reaction; Inert atmosphere; 2: benzaldehyde in tetrahydrofuran T=-78 - 20°C; Wittig reaction; Inert atmosphereCooling with acetone-dry ice; optical yield given as percent dediastereoselective reaction;

1: P-ethyl-P-phenyldibenzophospholium bromide With potassium hexamethylsilazane in tetrahydrofuran Wittig reaction; Inert atmosphere; 2: benzaldehyde in tetrahydrofuran T=-78 - 20°C; Wittig reaction; Inert atmosphereCooling with acetone-dry ice; optical yield given as percent dediastereoselective reaction;