The novel 19-nor-lα,25-dihydroxy vitamin D3 analogues possessing an ethyl at the 2-position(4 and 5), were synthesized by coupling 25-hydroxy Windaus-Grundmann
A simple route for the preparation of lipo-alkaloid is presented. When aconitine or one of its analogues is heated with a fatty acid for 20 min at 100℃ in wate
Ph2NH and PCl3 interacted at a molar ratio of 1∶1.05 and slow-elevated temperature and then at 210-220 ℃ for 6 h. The brown solution obtained was treated with