Efficient Synthesis of (Z)-4-((Substituted phenylamino)methylidene)isoquinoline-1,3(2H,4H)-diones Using the Eschenmoser Coupling Reaction
作者:Jiří Hanusek、Lukáš Marek、Jiří Váňa、Jan Svoboda、Markéta Svobodová
DOI:10.1055/a-2198-1589
日期:2024.2
reaction of 4-bromoisoquinoline-1,3(2H,4H)-diones with substituted thioformanilides, thioacetanilides, and thiobenzanilides gave 18 (Z)-4-((substituted phenylamino)methylidene)isoquinoline-1,3(2H,4H)-diones. The reaction occurs under mild conditions (DMF or MeCN, 25–60 °C) without any base or thiophile and in good yields (43–95%). Furthermore, for the synthesis of starting thioformanilides carrying basic
一种新颖的合成策略,涉及 4-溴异喹啉-1,3(2 H ,4 H )-二酮与取代的硫代甲苯胺、硫代乙酰苯胺和硫代苯甲酰苯胺的 Eschenmoser 偶联反应,得到 18 ( Z )-4-((取代的苯氨基)亚甲基)异喹啉-1,3(2 H ,4 H )-二酮。该反应在温和条件下(DMF 或 MeCN,25–60 °C)发生,无需任何碱或亲硫剂,且收率良好(43–95%)。此外,为了合成带有碱性取代基的起始硫代甲酰苯胺,开发了一种新的硫代酰化方案,其中涉及由二硫化碳和三乙基硼氢化锂形成的硫代酰化剂。