Metal hydride reduction of 13β-kaur-16-en-15-one afforded the 1,4-reduction product, (16R)-13β-kauran-l5β-ol but none of the expected 1,2-reduction product, 13β-kaur-16-en-15β-ol; in concentrated solution, a dimer (19) was a minor product. Treatment of 13β-kaur-16-en-15α-ol with aqueous acid in methanol yielded a dimeric ether (20) in addition to 17-hydroxy- and 17-methoxy-13β-kaur-15-ene. The four
金属
氢化物将13β-kaur -16-en-15-还原为1,4-还原产物(16 R)-13β-kauran-15β-ol,但没有一个预期的1,2-还原产物13β- kaur-16-en-15β-ol; 在浓溶液中,二聚物(19)是次要产物。用
甲醇中的酸
水溶液处理13β-kaur-16-en-15α-ol除了17-羟基-和17-甲氧基-13β-kaur-15-烯外,还产生了二聚醚(20)。制备了13β-kauran-15-ol的四个异构体;它们的mps和旋光度与以前报道的不同。