chromium(VI) oxide; sulfuric acid in water; acetone T=0°C; 0.5 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 View Scheme

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 View Scheme

2,4-dinitrophenylhydrazone; LCA(long chain aldehydes)-forming activity in Ulva pertusa fronds solubilized by Triton X-100 T=35°C; 0.25 h; Yield given;

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