six-membered carbocycle fused uracils has been demonstrated by the reaction of the remotely enolizable 6-methyluracil-5-carbaldehydes with 2-bromoenals. The reaction involves an N-heterocyclic carbene-catalyzed formal [4 + 2] annulation of o-quinodimethane (oQDM) dienolates with α,β-unsaturated acylazoliums, followed by a cascade lactone formation/decarboxylation process. This protocol unlocks a new platform
远程可烯醇化的 6-methyluracil-5-carbaldehydes 与 2-bromoenals 的反应证明了一种前所未有的新型六元碳环稠合尿
嘧啶的有机催化不对称结构。该反应涉及 N-杂环卡宾催化的
甲醛 [4 + 2] 环化邻醌二
甲烷 ( o Q
DM) 二烯醇化物与 α,β-不饱和酰基唑鎓,然后是级联内酯形成/脱羧过程。该协议解锁了一个新平台来获取对映体富集的碳环融合尿
嘧啶。