Efficient methods for deoxygenation of secondary and tertiary alcohols of some C19-diterpenoid alkaloids are presented. Thus deltaline (1) was converted to delpheline (2) or to 10-deoxydeltaline (7); deltamine (8) to 6-deoxydetamine (10); and delpheline (2) to 6-deoxydelpheline (12). An unusual elimination product 4 was formed when chloro-derivative 3 was reduced with LiAlH4.
提出了一些C 19-二萜
生物碱的仲醇和叔醇脱氧的有效方法。因此,将增量素(1)转化为增量素(2)或转化为10-脱氧增量素(7);deltamine(8)至6-deoxydetamine(10);和去氧
菲林(2)至6-脱氧去氧
菲林(12)。一个不寻常的消除产物4当
氯衍
生物形成3用的LiAlH降低4。