A novel process for the manufacture of compounds of the formula
wherein R
1
and R
2
independently represent aroyl.
The present invention also concerns novel intermediates used in the novel process for making compounds of formula I.
一种制造化合物的新工艺,其
化学式为其中R1和R2独立地代表芳酰基。本发明还涉及用于制造式I化合物的新中间体。