中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
4beta,9alpha,12beta,13alpha,20-五羟基惕各-1,6-二烯-3-酮 | phorbol | 17673-25-5 | C20H28O6 | 364.439 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
佛波醇13-乙酸酯 | Phorbol-13-acetate | 32752-29-7 | C22H30O7 | 406.476 |
—— | 12-O-tetradecanoyl-13,20-O-diacetyl-phorbol | 71327-72-5 | C38H58O9 | 658.873 |
佛波醇12-十四酸酯13-乙酸酯 | Phorbol 12-myristate 13-acetate | 16561-29-8 | C36H56O8 | 616.836 |
—— | 12-O-decanoylphorbol-13-acetate | 16561-27-6 | C32H48O8 | 560.728 |
—— | 12-O-dodecanoylphorbol-13-acetate | 16844-64-7 | C34H52O8 | 588.782 |
—— | 12-O-Hexadecanoyl-phorbol-13-acetate | 20839-12-7 | C38H60O8 | 644.89 |
—— | 12-O-n-Octanoyl-phorbol-13-acetat | 72416-83-2 | C30H44O8 | 532.675 |
佛波醇-12-单吡啶 | phorbol 12-Myristate | 20839-06-9 | C34H54O7 | 574.799 |
4beta,9alpha,12beta,13alpha,20-五羟基惕各-1,6-二烯-3-酮 | phorbol | 17673-25-5 | C20H28O6 | 364.439 |
佛波醇12-N-甲基邻氨基苯甲酸酯 | sapintoxin D | 80998-07-8 | C30H37NO8 | 539.626 |
In phorbol and partial acetates of phorbol the hydroxyl groups in the 20-, 13-, 12- and 4-positions can be etherified with one of the following methods: diazoalkane/Al-i-propylate, tritylchloride/pyridine and methyl-iodide/silveroxide. The investigation of suitable phorbol ethers with Fehling's and Tollens' reagent proves that the tertiary hydroxyl at the cyclopropane ring is solely responsible for the reducing properties of phorbol. Thus, phorbol is the first natural compound in which this reaction of tertiary cyclopropanols was detected.
Base catalysed transesterification of phorbol-12,13,20-tribenzoate yields phorbol-12,13-dibenzoate. By base catalysed transesterification of phorbol-pentaacetate phorbol-9,12,13-triacetate is obtained. This can be re-acetylated to give phorbol-9,12,13,20-tetraacetate which is also obtained by treatment of phorbol-12,13,20-triacetate with acetic anhydride/p-toluene-sulfonic acid.
Reduction of phorbol-12,13,20-triacetate with LiAlH4 yields phorbol-3-ol which reduces Fehling's and Tollen's reagent. Reduction of the 3-keto group alone can be accomplished with sodium borohydride. From all phorbol-esters investigated only in phorbol-pentaacetate an acetyl migration is observed during the sodium borohydride reduction leading to phorbol-3-ol-3,9,12,13,20-pentaacetate. By these findings those two tertiary hydroxyl groups of phorbol which are not acetylated with acetic anhydride/pyridine at room temperature were further characterized.
Oxidation of phorbol-12,13-diacetate with activated manganese dioxide yields phorbol-20-al-12,13-diacetate. By evaluation of nmr-spectra of this aldehyde and of some of its derivatives as well as of the epoxide of phorbol-12,13-diacetate and of 6-oxo-7-hydroxy- and 6,7-diacetoxy-20-nor-phorbol-12,13-diacetate the sequence of C-atoms around the allylic alcohol group of phorbol is further characterized.