1: (PhO)2P(O)CH2CO2tBu With sodium hydride in methanol T=0°C; Metallation; 0.25 h; 2: Caprylic Aldehyde in tetrahydrofuran; methanol T=-78 - 0°C; Condensation; Horner-Wadsworth-Emmons reaction; 1.5 h;

1: (PhO)2P(O)CH2CO2tBu With N-benzyl-trimethylammonium hydroxide in methanol T=-78°C; Elimination; 0.166667 h; 2: benzaldehyde in tetrahydrofuran; methanol T=-78°C; Condensation; Horner-Wadsworth-Emmons reaction; 1 h;