(25R)-2,3,25,27-tetrahydrophysalin A 在
ammonium acetate 、 溶剂黄146 作用下,
反应 20.0h,
以28 mg的产率得到(25S)-2,3,25,27-tetrahydro-4,7-didehydro-7-deoxyneophysalin A
参考文献:
名称:
Benzilic acid rearrangement-type reaction of physalins to neophysalins. Structural revision of one of the dehydration products of physalin A
摘要:
The previously proposed structure of an acid-induced dehydration product of physalin A, a 13,14-seco-16,24-cyclosteroid, is revised as having a new carbon skeletal structure named neophysalin. The reaction from physalins to neophysalins proceed via a kind of the benzilic acid rearrangement.