d-Kaurene (XXXVI) and d-phyllocladene (XXXVII) were synthesized from l-abietic acid (I) via intramolecular carbenoid reaction of diazoketones and subsequent cleavage of the resulting cyclopropyl ring with Li-liq. NH3. Methyl dehydroabietate (XVI) and dehydroabietane (V) introduced from I were used as the starting materials. The improved synthesis of V was also described.
d-Kaurene (XXXVI)和 d-phyllocladene (XXXVII)是由 l-阿
松香酸 (I) 通过重
氮酮的分子内类羰基反应合成的,随后用 Li-liq.NH3。脱氢阿比特酸甲酯 (XVI) 和从 I 引入的脱氢阿比特烷 (V) 被用作起始原料。此外,还介绍了 V 的改进合成方法。