A novel approach to biologically relevant oxazolo[5,4-d]pyrimidine-5,7-diones via readily available diazobarbituric acid derivatives
作者:Martha Gecht、Grigory Kantin、Dmitry Dar'in、Mikhail Krasavin
DOI:10.1016/j.tetlet.2019.151120
日期:2019.10
from 1,3-disubstituted barbituric acids to biologically relevant oxazolo[5,4-d]pyrimidine-5,7-diones was developed that features sulfonyl-azide-free (SAFE) diazo transfer and Rh2(esp)2-catalyzed cycloaddition of the resulting 5-diazobarbituric acids with aliphatic and aromatic nitriles. Besides being shorter compared to the previously described approaches, the method allows introduction of alkyl substituents
从1,3-二取代的巴比妥酸到生物学上相关的恶唑并[5,4- d ]嘧啶-5,7-二酮的另一种途径被开发出来,其特征在于无磺酰叠氮(SAFE)的重氮转移和Rh 2(esp)2催化的5-重氮巴比妥酸与脂族和芳族腈的环加成反应。除了比先前描述的方法短之外,该方法还允许在稠合杂环系统的1,3-恶唑环上引入烷基取代基。