Dopamine quinone chemistry: a study of the influence of amide, amidine and guanidine substituents [-NH-CX-Y] on the mode of reaction
作者:Edward J. Land、Almudena Perona、Christopher A. Ramsden、Patrick A. Riley
DOI:10.1039/b819367c
日期:——
The influence of N-substituents on the mode of reaction of ortho-quinones generated by oxidation of N-substituted dopamine derivatives 8 has been studied. Ortho-quinones with amide, urea or guanidine side chains are relatively stable, with evidence of rearrangement to para-quinomethanes. The N-methylthiourea derivative 11 rapidly cyclises giving a bicyclic product 12. The trichloromethylamidine derivative
已经研究了N-取代基对由N-取代的多巴胺衍生物8的氧化产生的邻醌的反应方式的影响。邻苯二甲酰胺尿素胍侧链或胍侧链是相对稳定的,具有重排为对喹啉甲烷的证据。所述Ñ -methylthiourea衍生物11迅速cyclises给予双环产物12。三氯甲基am衍生物13也快速环化,但在这种情况下给出螺环衍生物14。相反由其它瞬态形成螺环产物的邻-quinones从多巴胺衍生物衍生的,例如,19,产品14是稳定的并且已经被分离和完全表征。