提出了杂芳族N-甲苯磺酰基hydr与硫醇的无金属偶联。还显示了合成杂芳基N-甲苯磺酰基hydr的简便合成途径。以高收率合成了具有吡咯,吡啶,噻吩并[2,3- b ]吡啶,咪唑并[1,2- a ]吡啶和6 H-噻吩并[2,3- b ]吡咯衍生物的有价值的硫醚。该偶联反应可以一锅法进行,并且通过使用杂芳基醛而放大至克级,而无需分离N-甲苯磺酰zone。
Synthesis of 5-chloropyrrole carboxaldehydes from 5-oxopyrrolidine carboxamides
摘要:
N-alkyl-5-chloropyrrole-2(or 3)-carboxaldehydes are obtained by treatment of N-alkyl-5-oxopyrrolidine-2 (or 3)-carboxamides by phosphorus oxychloride and basic hydrolysis. (C) 1997 Elsevier Science Ltd.
Modulating Reactivity and Diverting Selectivity in Palladium-Catalyzed Heteroaromatic Direct Arylation Through the Use of a Chloride Activating/Blocking Group
作者:Benoît Liégault、Ivan Petrov、Serge I. Gorelsky、Keith Fagnou
DOI:10.1021/jo902515z
日期:2010.2.19
Through the introduction of an aryl chloride substituent, the selectivity of palladium-catalyzeddirectarylation may be diverted to provide alternative regioisomeric products in high yields. In cases where low reactivity is typically observed, the presence of the carbon−chlorine bond can serve to enhance reactivity and provide superior outcomes. From a strategic perspective, the C−Cl bond is easily