The invention relates to a method for the photochemical isomerization of organic compounds, in particular for the photochemical conversion of tachysterol compounds into previtamin D compounds and of trans-vitamin D compounds into cis-vitamin D compounds, under the influence of radiation, by exposing a solution of the organic compound to be converted in the presence of a non-polymeric photosensitizer to light with approx. 300-1,000 nm wavelength, and by then isolating the resulting product, wherein a substituted thiophene derivative having a substantial absorption in said wavelength region is used as the photosensitizer. The invention also relates to a new photosensitizer to be used for said isomerization reaction.
本发明涉及一种有机化合物的光
化学异构化方法,特别是将快
速甾醇化合物转化为预
维生素D化合物和将反式
维生素D化合物转化为顺式
维生素D化合物的光
化学转化方法。该方法是在辐射的作用下,通过将有机化合物的溶液在非聚合型光敏剂的存在下暴露于约300-1,000纳米波长的光线下,然后分离所得产物。其中,所使用的光敏剂是具有在该波长区域内显著吸收的取代
噻吩衍
生物。本发明还涉及一种新的光敏剂,用于上述异构化反应。