Cyclocondensation versus Cyclocondensation Plus Dehydroxylation During the Reaction of Flavones and Hydrazine
作者:Carlos M. Solis、Mario O. Salazar、I. Ayelen Ramallo、Paula García、Ricardo L. E. Furlan
DOI:10.1002/ejoc.202200455
日期:2022.7.7
Concomitant selective dehydroxylation during the transformation of flavones into pyrazoles with hydrazine is determined by the A-ring substitution pattern and propensity to keto–enol tautomerization. The obtained pyrazoles show varied tyrosinase inhibition properties, including one nanomolar inhibitor.
在将黄酮转化为吡唑与肼的过程中伴随的选择性脱羟基由 A 环取代模式和酮-烯醇互变异构的倾向决定。获得的吡唑表现出不同的酪氨酸酶抑制特性,包括一种纳摩尔抑制剂。