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。
from 1,3-disubstituted barbituric acids to biologicallyrelevant 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。
Biltz; Strufe, Justus Liebigs Annalen der Chemie, 1914, vol. 404, p. 164