Synthesis of fluorine analogues of vitamin E.
作者:ITSUMARO KUMADAKI、MIHOKO TAMURA、AKIRA. ANDO、TAKABUMI NAGAI、MAYUMI KOYAMA、TAKUICHI MIKI
DOI:10.1248/cpb.36.515
日期:——
As part of a search for biologically active analogues of vitamin E, fluorine derivatives of tocotrienol and related compounds were synthesized by the ring-closure of trifluoroprenols with trimethylhydroquinone. For this purpose, the trifluoroprenols were synthesized by the Wittitg-Horner reaction of trifluoroacetone or its prenyl homologues with triethylphosphonoacetate followed by reduction of the trifluoromethylated acrylic ester derivatives. Although 4, 4, 4-trifluoroprenol itself did not react with the hydroquinone, 7, 7, 7-trifluorodiprenol and higher prenols gave 6-chromanols with a trifluofomethylated side-chan.
在寻找具有生物活性的维生素 E 类似物的过程中,通过三氟丙烯醇与三甲基对苯二酚的环闭反应合成了生育三烯酚和相关化合物的氟衍生物。为此,三氟丙烯醇是通过三氟丙酮或其炔基同系物与三乙基膦酰基乙酸酯的 Wittitg-Horner 反应合成的,然后还原三氟甲基化丙烯酸酯衍生物。虽然 4,4,4-三氟丙烯醇本身不与对苯二酚反应,但 7,7,7-三氟二丙烯醇和更高的前烯醇会产生具有三氟甲基化侧链的 6-铬醇。