Syntheseversuche in der Griseofulvinreihe. 3. Mitteilung. Eine neue Ringöffnung bei Dehydrogriseofulvin
作者:E. Kyburz、J. Würsch、A. Brossi
DOI:10.1002/hlca.19620450311
日期:——
(−)-Dehydrogriseofulvin (I) is converted to the diphenylether derivatives IV or VIII, respectively, by action of a base or an acid. The mechanism of the basic ring opening reaction has been established by use of 14C labelled methanol. In the case of the epimerisation of griseofulvin (II) under the influence of methylate, however, it is shown that a more complicated mechanism is involved.
(-)-脱氢麦草黄素(I)在碱或酸的作用下分别转化为二苯醚衍生物IV或VIII。通过使用14 C标记的甲醇已经建立了基本的开环反应机理。然而,在灰黄霉素(II)在甲基化影响下的差向异构化的情况下,表明涉及更复杂的机制。