Acetic acid Cholecalciferol

In addition, differences between the u.v. spectra of the 6-methyl isomers and the non-methylated analogues were attributed to these steric interactions. Catalytic hydrogenation of trans-cholecalciferol gave mainly the previously unknown (10i )-epimer of dihydrotachysterols (278) whereas hydro-boration-acetic acid treatment gave a 1 1 mixture of (278) and the (105)-... 

Ingredients Calcium Carbonate, Microcrystalline Cellulose, Magnesium Oxide, Ferrous Fumarate, Ascorbic Acid, Maltodextrin, Gelatin, dl-Alpha-Tocopheryl Acetate, Dicalcium Phosphate Less than 2% of Beta-Carotene, Biotin, Cholecalciferol, Croscarmellose Sodium, Cupric Oxide, Cyanocobalamin, D-Calcium Pantothenate, FD C Red 40 Dye, FD C Red 40 Lake, FD C Yellow 6 Lake, Folic Acid, Hydroxypropyl Methylcellulose, Niacinamide, Polyethylene Glycol, Polysorbate 80, Potassium Iodide, Pyridoxine Flydrochloride, Riboflavin, Silicon Dioxide, Soybean Oil, Starch, Stearic Acid, Thiamine Mononitrate, Titanium Dioxide (color), Vitamin A Acetate, Zinc Oxide... 

Lutavit D3 500, D3 500 S. See Cholecalciferol Lutavit E 50, E 50 S. See Tocopheryl acetate Lutavit H 2. See d-Biotin Lutavit Kz Stab.] Lutavit AQ. See Menadione Lutavit Niacin Feed Grade. See Nicotinic acid Lutein. See Xanthophyll... 

One of the first applications of the Hajos-Wiechert reaction in the vitamin D area was undertaken by Uskokovic s group at Hoffman LaRoche. The starting point of a synthesis of la,25S,26-trihydroxy-cholecalciferol was the known acid derivative 72. After five steps, intermediate 73 was converted into the acetate 74 via the Bayer-Villiger oxidation. Following a deprotection, oxidation and acetate removal step, the... 

Tosyl cholesteryl acetate (V) (Akhtar and Barton, 1964) was first converted to the corresponding 19-iodide (VI) by treatment with sodium iodide in boiling ethyl methyl ketone. Reduction of the iodide with zinc and acid in the presenee of tritiated water provided cholesteryl acetate-19-H (VII) which was then converted to 7-dehydro-cholesterol-19-H (VIII), presxunably via the N-bromosuccinimide reaction. Ultraviolet irradiation and thermal rearrangement of the provitamin yielded cholecalciferol-9,19-H (IX). 

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