Synthesis of Pyrrolo[2,3-<i>d</i>
]pyrimidines by Copper-Mediated Carbomagnesiations of <i>N</i>
-Sulfonyl Ynamides and Application to the Preparation of Rigidin A and a 7-Azaserotonin Derivative
作者:Johannes Nickel、Maitane Fernández、Lydia Klier、Paul Knochel
DOI:10.1002/chem.201602519
日期:2016.9.26
N‐alkynyl‐5‐iodo‐6‐sulfamido‐pyrimidines with iPrMgCl⋅LiCl followed by a transmetalation with CuCN⋅2 LiCl produces, after intramolecular carbocupration, metalated pyrrolo[2,3‐d]pyrimidines. Quenching of these pyrimidines with allylic halides or acid chlorides results in polyfunctional pyrrolo[2,3‐d]pyrimidines. Further reaction with ICl and a Negishi cross‐coupling, using PEPPSI‐iPr as the catalyst, furnishes
治疗容易得到ñ -炔基-5-碘-6-磺氨基-嘧啶与我PrMgCl⋅LiCl随后用CuCN⋅2的LiCl一个转移金属化产生,分子内carbocupration后,金属化的吡啶- [R ROLO [2,3- d ]嘧啶。这些嘧啶与烯丙基卤化物或酰氯的猝灭反应会产生多官能吡咯并[2,3- d ]嘧啶。与ICl的进一步反应和使用PEPPSI- i Pr作为催化剂的Negishi交叉偶联提供了完全取代的N-杂环。已经完成了海洋生物碱刚性蛋白A的正式合成,以及与天然激素5-羟色胺有关的7-氮杂鸟嘌呤衍生物的制备。