HRID651950
反应详情
EQUATION
反应方程式
REACTANTS
反应物
PRODUCTS
生成物
PROCEDURE
实验过程
The cholest-5-ene from Example 4 (c) was acetylated with acetic anhydride/pyridine to yield the triacetate which was subjected to bromination with dibromodimethylhydantoin followed by dehydrobromination with trimethylphosphite according to the procedure of Example 3 (b) to yield, after chromatography on silver nitrate impregnated silica gel, 1α,3β,25-triacetoxycholesta-5,7-diene (m.p. 96°-101°; αD -24° in CHCl3 ; λmaxEt2O 262 (7,900), 271 (11,500), 282 (12,400), 294 (7,300) nm.