作者:B. Z. Askinazi、L. N. Kivokurtseva、N. S. Bobrova、N. Ya. Kozarinskaya
DOI:10.1007/bf00767176
日期:1985.10
4-oxa-5-sitosten-3-one, the enol-lactone of the ke~oacid of sitosterol (IV), with phenyl acetate-2-1~C. A twofold excess of the relatively expensive phenyl acetate-2-1~C was utilized for this. The description of this synthesis in the work [4] is insufficiently detailed for satisfactory reproducibility. The synthesis of ~-sitosterol-4-~C presented in the work [5], starting from the same enol-lactone, appeared more