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Synthesis of 23E-ethylidene spirostanes via the BF3·Et2O-catalyzed aldol condensation of steroid sapogenins and acetaldehyde
Tetrahedron Letters ( IF 1.5 ) Pub Date : 2020-04-04 , DOI: 10.1016/j.tetlet.2020.151918 Hugo A. Serrano-Vázquez , Marcos Flores-Alamo , Martín A. Iglesias-Arteaga
中文翻译：
的23合成ë -亚乙基spirostanes经由所述BF 3 ·的Et 2 O形催化羟醛甾皂角苷配基和乙醛的缩合
更新日期：2020-04-04
Tetrahedron Letters ( IF 1.5 ) Pub Date : 2020-04-04 , DOI: 10.1016/j.tetlet.2020.151918 Hugo A. Serrano-Vázquez , Marcos Flores-Alamo , Martín A. Iglesias-Arteaga
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The treatment of acetylated steroid sapogenins with acetaldehyde and BF3·Et2O in CH2Cl2 led to moderate yields of the corresponding 23E-ethylidene spirostanes. The obtained compounds were characterized using a combination of 1D and 2D NMR techniques. Single crystal X-ray diffraction corroborated the proposed structures.
中文翻译：
的23合成ë -亚乙基spirostanes经由所述BF 3 ·的Et 2 O形催化羟醛甾皂角苷配基和乙醛的缩合
在CH 2 Cl 2中用乙醛和BF 3 ·Et 2 O处理乙酰化甾体皂苷元可以相应地获得23种E-亚乙基螺环烷烃的中等收率。结合1D和2D NMR技术对获得的化合物进行表征。单晶X射线衍射证实了所提出的结构。
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