申请人:——
公开号:US20040082793A1
公开(公告)日:2004-04-29
The present invention pertains to methods for preparing a compound of Formula (I), wherein A is O or N—L; each L is independently H or an acyl group; K is, together with the two contiguous linking carbon atoms, a phenyl ring, a 5- or 6-membered heteroaromatic ring or an aromatic 8-, 9- or 10-membered fused carbobicyclic or heterobicyclic ring system wherein each ring or ring system is optionally substituted; R
1
is H, C
1
to C
4
alkyl or CO
2
R
3
; R
2
is H or C
1
to C
4
alkyl; and R
3
is C
1
to C
4
alkyl; comprising hydrogenating a compound of Formula (II), wherein n is 0, 1 or 2 in the presence of a catalyst comprising palladium to form the compound of Formula (I). This invention further pertains to methods for preparing compounds of Formula (II) useful for preparing compounds of Formula (I). This invention also pertains to compounds used in these methods.
1
本发明涉及制备式(I)化合物的方法,其中A为O或N—L;每个L独立地为H或酰基;K与两个相邻连接碳原子一起形成苯环、5-或6-成员杂环芳香环或芳香8、9或10-成员融合的碳双环或杂双环环系,其中每个环或环系可选地被取代;R1为H、C1到C4烷基或CO2R3;R2为H或C1到C4烷基;R3为C1到C4烷基;包括在钯催化剂存在下氢化式(II)化合物,其中n为0、1或2,以形成式(I)化合物。本发明还涉及制备式(II)化合物的方法,用于制备式(I)化合物。本发明还涉及用于这些方法的化合物。