rearranged to 1-cyano-3,4-seco-5α-lanostane (III). Confirmation for the structural assignments was obtained from a series of proton magnetic resonance and mass spectral studies. Application of the new photochemical reaction was suggested to preparation of certain aldehydes otherwise accessible only with difficulty.
发现 3β-nitrito-5α-lanostane 的紫外线照射遵循不寻常的反应途径并产生 2-oximo-3-oxo-3,4-seco-5α-lanostane (IV)。新的醛很容易转化为
肟和苯腙衍
生物。对光解产物进行乙酰化产生
乙酸肟 (IX),它很容易重排为 1-
氰基-3,4-seco-5α-羊毛脂烷 (III)。从一系列质子磁共振和质谱研究中获得了结构分配的确认。建议将新的光
化学反应应用于某些醛的制备,否则很难获得。