申请人:——
公开号:US20030004358A1
公开(公告)日:2003-01-02
1
The invention relates to compounds of formula (2) in which R1, R2, R3 and R4 have the meanings indicated in the description, their prepration and their further reaction to give compounds of formula (1), in which A
1
, A
2
and R4 have the meanings indicated in the description. The compounds of the formula (1) are valuable intermediates for the preparation of medicaments.
该发明涉及公式(2)中的化合物,其中R1、R2、R3和R4具有描述中指示的含义,它们的制备以及它们的进一步反应以给出公式(1)中的化合物,其中A1、A2和R4具有描述中指示的含义。公式(1)中的化合物是制备药物的有价值的中间体。