Ru(II)-Catalyzed C–H Activation/Alkylation of 3-Formylbenzofurans with Conjugated Olefins: Product Divergence
作者:Kolluru Srinivas、Shaziyaparveen K. Siddiqui、Jyothi K. Mudaliar、Chepuri V. Ramana
DOI:10.1021/acs.joc.8b03267
日期:2019.5.3
Ru-catalyzed alkylation of 3-formylbenzofuran with acrylates and acrylamides has been described. Branched selectivity with unsubstituted or β-substituted acrylates/acrylamides and linear selectivity with α-substituted acrylates have been observed. However, in all of the cases, the intermediate alkylation products seem to undergo further reactions, either cycloannulation or deformylation, depending
已经描述了Ru用丙烯酸酯和丙烯酰胺催化3-甲酰基苯并呋喃的烷基化。已经观察到与未取代的或β-取代的丙烯酸酯/丙烯酰胺的支链选择性和与α-取代的丙烯酸酯的线性选择性。然而,在所有情况下,取决于所用的底物,中间烷基化产物似乎都经历了进一步的反应,无论是环环化还是甲酰基化。例如,对于丙烯酸甲酯,中间支化的烷基化产物与另一个丙烯酸甲酯分子进行环环化,从而导致致密地官能化的环己烯环的形成。另一方面,在N-单取代的丙烯酰胺的情况下,支链烷基化会随着分子内的醛-酰胺缩合而进行,从而导致吡啶-2-酮环化。然而,