申请人:Kim Keun-Sik
公开号:US20070149813A1
公开(公告)日:2007-06-28
A process for the preparation of a compound of formula I,
wherein R
1
and R
2
are ortho or para substituents, independently selected from the group consisting of hydrogen, hydroxyl, C
1
-C
6
alkyl, C
1
-C
6
alkoxy, C
7
-C
9
aralkoxy, C
2
-C
7
alkanoyloxy, C
1
-C
6
alkylmercapto, halo and trifluoromethyl; R
3
is hydrogen or C
1
-C
6
alkyl; R
4
is hydrogen, C
1
-C
6
alkyl, formyl or C
2
-C
7
alkanoyl; n is one of the integers 0, 1, 2, 3 or 4; and the dotted line represents optional olefinic unsaturation;
comprising hydrogenating a compound of formula III,
in the presence of a nickel or cobalt catalyst at a temperature of about 5° C. to 25° C.
一种制备式I化合物的方法,其中R1和R2是邻位或对位取代基,独立选择自氢、羟基、C1-C6烷基、C1-C6烷氧基、C7-C9芳基氧基、C2-C7烷酰氧基、C1-C6烷基硫基、卤素和三氟甲基的群组中;R3是氢或C1-C6烷基;R4是氢、C1-C6烷基、甲酰基或C2-C7烷酰基;n是整数0、1、2、3或4之一;虚线表示可选的烯烃不饱和度;包括在5℃至25℃的温度下,在镍或钴催化剂存在下加氢式III化合物的过程。