4-羟基-6,9-二氟苯并[ g ]异喹啉-5,10-二酮的合成并转化为4-羟基-6,9-双[(氨基烷基)氨基]苯并[ g ]异喹啉-5,10-二酮
摘要:
已开发出合成程序,可产生4-羟基-6,9-二氟苯并[ g ]异喹啉-5,10-二酮(4a)及其3-甲基类似物4b。用N,N-二甲基乙二胺代替4a中的氟化物的尝试是失败的。用N-(叔丁氧基羰基)乙二胺处理的类似物4a导致15,其由亲核胺加至C-3形成。另一方面,在用N,N-二甲基乙二胺处理时,类似物4b产生了预期的二氟化物置换产物3c。通过用苯基重氮甲烷进行苄基化来保护4a的羟基导致4c,在用N-(叔丁氧羰基)乙二胺或N,N-二甲基乙二胺处理后得到4c,得到相应的6,9-双取代的类似物18a和18b,分别。通过在Pearlman催化剂上氢化进行的18a和18b的还原性脱苄基化也影响了醌的部分还原。但是,过度还原的产物的空气氧化分别导致3a和3b。3a的治疗用氯化氢气体生成3d的盐酸盐。将Op-甲氧基苄基-N,N'-二异丙基脲加到4a中得到对-甲氧基苄基类似物4d。用N,N-二甲基乙二胺或N-
[EN] PROCESS FOR THE MANUFACTURE OF N-ALKOXALYL-ALANINATES<br/>[FR] PROCEDE DE FABRICATION DE N-ALKOXALYL-ALANINATES
申请人:DSM IP ASSETS BV
公开号:WO2004087640A1
公开(公告)日:2004-10-14
A process for the manufacture of alkyl N-alkoxalyl-alaninates of the formula alkylO-CO-CO-NH-CH(CH3)-CO-Oalkyl comprises reacting alanine with a dialkyl oxalate under substantially non-acidic conditions, which may be created by carrying out the reaction in the presence of a base. The reaction may furthermore be carried out in the presence of added alkanol, preferably one featuring the alkyl group corresponding to that of the employed dialkyl oxalate. The monoesters N-alkoxalyl-alanine of the formula alkylO-CO-CO-NH-CH(CH3)-COOH, which as intermediates in the process can be isolated therefrom, are novel and as such are also an object of the present invention. The alkyl N-alkoxalylalaninates are useful intermediates in the multistep process for the manufacture of vitamin B6.