Substrate-controlled, PBu<sub>3</sub>-catalyzed annulation of phenacylmalononitriles with allenoates enables tunable access to cyclopentenes
作者:Narendra Kumar Vaishanv、Sanoop P Chandrasekharan、Mohd Khalid Zaheer、Ruchir Kant、Kishor Mohanan
DOI:10.1039/d0cc04688d
日期:——
phenacylmalononitriles with allenoates, controlled by the γ-substitution on allenoates, offers a tunable synthesis of multifunctionalized cyclopentene carboxamides and cyclopentenols. An unprecedented formation of cyclopentene carboxamide was observed when allenic esters bearing a substitution at the γ-position were employed, while unsubstituted allenoates produced cyclopentenols. The former reaction likely involves
在PBu 3催化的[3 + 2]苯甲酰丙二腈与脲基酸酯的环化反应中的差异,由脲基酸酯上的γ取代控制,提供了多官能化环戊烯羧酰胺和环戊烯醇的可调谐合成。当使用在γ位带有取代基的烯丙基酯时,观察到空前的环戊烯羧酰胺形成,而未取代的烯醇酸酯产生环戊烯醇。前一种反应可能以多米诺骨牌方式涉及迈克尔/醛/亲核环化序列。