1: 75 percent / n-BuLi / tetrahydrofuran; hexamethylphosphoric acid triamide / -78 °C / under N2 2: 96 percent / 30percent H3PO4 / methanol / 5 h / Ambient temperature 3: 80 percent / CrO3 / pyridine; CH2Cl2 / 0.33 h / Ambient temperature View Scheme

LCA(long chain aldehydes)-forming activity in Ulva pertusa fronds solubilized by Triton X-100 T=35°C; 0.25 h;

1: n-BuLi / tetrahydrofuran; hexamethylphosphoric acid triamide / -78 °C / under N2 2: 30percent H3PO4 / methanol / 5 h / Ambient temperature 3: CrO3, conc H2SO4 / H2O; acetone / 0.5 h / 0 °C 4: LCA(long chain aldehydes)-forming activity in Ulva pertusa fronds solubilized by Triton X-100, 2,4-dinitrophenylhydrazone / 0.25 h / 35 °C 5: LCA(long chain aldehydes)-forming activity in Ulva pertusa fronds solubilized by Triton X-100 / 0.25 h / 35 °C View Scheme

1: CrO3, conc H2SO4 / H2O; acetone / 0.5 h / 0 °C 2: LCA(long chain aldehydes)-forming activity in Ulva pertusa fronds solubilized by Triton X-100, 2,4-dinitrophenylhydrazone / 0.25 h / 35 °C 3: LCA(long chain aldehydes)-forming activity in Ulva pertusa fronds solubilized by Triton X-100 / 0.25 h / 35 °C View Scheme

1: LCA(long chain aldehydes)-forming activity in Ulva pertusa fronds solubilized by Triton X-100, 2,4-dinitrophenylhydrazone / 0.25 h / 35 °C 2: LCA(long chain aldehydes)-forming activity in Ulva pertusa fronds solubilized by Triton X-100 / 0.25 h / 35 °C View Scheme