Stereoselective 7α-hydroxylation reaction of Δ5-steroids by a Fe(PA; picolinate)3/H2O2/MeCN system is presented. The 7α-hydroxylation reactions were achieved in 33-40% yields by addition of 30%-H2O2 to a solution of 3β-acetoxy-Δ5-steroids 1a-1d and a crystalline of Fe(PA)3 in MeCN.
通过Fe(PA;
皮考林酸盐)3/
H2O2/MeCN体系实现了Δ5类
固醇的立体选择性7α-羟基化反应。通过将30%- 添加到含有3β-乙酰氧基-Δ5类
固醇1a-1d和Fe(PA)3的MeCN溶液中,该反应的产率达到了33-40%。