Dawidar, A. M.; Saleh, A. A.; Abdel-Malek, M. M., Zeitschrift fur Naturforschung, Teil B: Anorganische Chemie, Organische Chemie, 1980, vol. 35, # 1, p. 102 - 106
p-TsOH-Catalyzed one-pot transformation of di- and trihydroxy steroids towards diverse A/B-ring oxo-functionalization
作者:Antara Sarkar、Jayanta Das、Pranab Ghosh
DOI:10.1039/c7nj01878a
日期:——
A solid support-mediated p-TsOH-catalyzed milder transformative protocol was developed to furnish diverse ring-A and/or ring-B oxo-functionalized steroids. To furnish interesting isomers involving the A/B-ring of biomolecules in a one-pot approach, only solid supports (and not solution!) were found to be effective. p-TsOH/SiO2-oxidation of 4β-hydroxycholesterol, the major oxysterol in human circulation
Abstract Procesterol, a new steroidal hydroxy ketone, has been isolated from the fresh and undried flowers of Calotropisprocera . The chemical and spectral studies identified it as a C-6 C-24 diepimer of stigmast-4-en-6β-ol-3-one.
Dawidar, A. M.; Saleh, A. A.; Abdel-Malek, M. M., Zeitschrift fur Naturforschung, Teil B: Anorganische Chemie, Organische Chemie, 1980, vol. 35, # 1, p. 102 - 106