1-官能化的6-羟基-4-甲基和6,11-二羟基-4-甲基萘[2,3 - g ]异喹啉-5,12-醌的合成
摘要:
以2-甲氧基和2,5-二甲氧基苯乙酮8a和8b为起始原料,通过多步序列获得了1-氯-4-甲基异喹啉-5,8-醌(6)及其6-溴衍生物7 。前一种化合物与高邻苯二甲酸酐的Diels-Alder缩合反应(22)导致两种可能的异构体的混合物:1-氯-11-羟基-4-甲基萘[2,3- g ]异喹啉-5,12-醌(23)和1-氯-6-羟基-4-甲基萘[2,3- g ]异喹啉-5,12-醌(24),该最后的四环氯醌具体地是从6-溴-1-氯-4获得的。 -甲基异喹啉-5,8-醌(7)和高邻苯二甲酸酐。然后,通过硝酸铵氧化或通过苯并环丁烯二酮(28)和1-氯-4-甲基异喹啉-5,8-醌(6)的环加成,通过光化学法制备6,11-二羟基衍生物。氯化合物很容易被二胺取代,从而提供相应的1-氨基取代的羟基四环醌。
Process for producing fused imidazole compound, reformatsky reagent in stable form, and process for producing the same
申请人:Nuwa Shigeru
公开号:US20050043544A1
公开(公告)日:2005-02-24
The present invention provides an industrially advantageous process for producing a steroid C
17,20
lyase inhibitor represented by the general formula (I):
and a Reformatsky reagent in a stable form suitable for the process.
In the present invention, a compound represented by the general formula (I) is produced by reducing a specific β-hydroxy ester compound derivative or a salt thereof obtained from a specific carbonyl compound in a Reformatsky reaction in the presence of a metal hydride complex and a metal halide, and then subjecting it to a ring-closing reaction. In the above Reformatsky reaction, it is useful to use a stable solution of a compound represented by the general formula BrZnCH
2
COOC
2
H
5
or a crystal of the compound which is represented by the formula (BrZnCH
2
COOC
2
H
5
.THF)
2
.
Reformatsky Reagent in Stable Form and Process for Producing the Same
申请人:Takeda Pharmaceutical Company Limited
公开号:EP2275411A2
公开(公告)日:2011-01-19
The present invention provides an industrially advantageous process for producing a steroid C17,20 lyase inhibitor represented by the general formula (I):
and a Reformatsky reagent in a stable form suitable for the process.
In the present invention, a compound represented by the general formula (I) is produced by reducing a specific β-hydroxy ester compound derivative or a salt thereof obtained from a specific carbonyl compound in a Reformatsky reaction in the presence of a metal hydride complex and a metal halide, and then subjecting it to a ring-closing reaction. In the above Reformatsky reaction, it is useful to use a stable solution of a compound represented by the general formula BrZnCH2COOC2H5 or a crystal of the compound which is represented by the formula (BrZnCH2COOC2H5·THF)2.