This invention relates to a process for the production of 7&agr;-methyl steroids of general formula I,
1
starting from compounds of general formula II,
2
which are reacted in an aprotic solvent in the presence of 1-30 mol % of a copper compound CuY
n
L
m
with 1-3 molar equivalents of CH
3
MgX, then with a strong acid.
The process according to the invention is distinguished in that 7&agr;-methyl steroids are obtained in good yields as well as high chemical purity and high diastereomer purities. The process is distinguished in that less waste accumulates with considerably higher throughput. The process according to the invention can therefore be suitable for the production of 7&agr;-methyl steroids on the industrial scale.
这项发明涉及一种从通式II的化合物出发,在无
水溶剂中与1-30摩尔%的
铜化合物CuYnLm和1-3摩尔当量的CH3MgX反应,然后与强酸反应,生产通式I的7α-甲基类
固醇的过程。根据本发明的方法在于获得良好收率、高
化学纯度和高对映体纯度的7α-甲基类
固醇。该方法的独特之处在于废物积累较少,且产量明显更高。因此,根据本发明的方法可能适用于工业规模上生产7α-甲基类
固醇。