开发了一种简便的方案,用于通过一锅缩合从 2-氨基呋喃/吡咯组合合成呋喃并[2,3- d ]嘧啶酮和吡咯并[2,3- d ]嘧啶酮库。本文报道的过程需要类似的反应条件,提供温和地获得两种不同系列的天然产物样杂环。呋喃并[2,3- d ]嘧啶酮和吡咯并[2,3- d ]嘧啶酮均针对一组人类癌细胞系进行了体外评估,包括针对人类癌症HeLa(宫颈)、MCF-7(乳腺癌)和HT- 29(结肠)细胞系。衍生物12n ((2-(4-氯苯基)-1-甲基-6,7,8,9-四氢吡啶并[1,2- a ]吡咯并[2,3- d ]嘧啶-4(1H ) -酮) ) 对 HeLa 细胞系表现出高活性 (IC 50 = 6.55 ± 0.31 µM)。这些产品可以进行各种修饰,因此代表了抗癌药物发现的重要骨架。 图形概要
Chiral iminophosphorane catalyzed asymmetric sulfenylation of 2-substituted alkylcyanoacetates
作者:Yanxia Zhang、Henry N.C. Wong、Xin-Yan Wu、Jianwei Han
DOI:10.1016/j.tetlet.2020.151755
日期:2020.4
Chiral iminophosphorane organocatalysis enables a wide range of asymmetric transformations with excellent level of enantioselectivity. Herein, an asymmetric sulfenylation of 2-substituted alkylcyanoacetates was achieved with tartaric acid derived chiral iminophosphoranes in an efficient manner. The iminophosphorane catalyst exhibits high catalytic activity, and as a result, the corresponding sulfenylated