One-Pot Regioselective Synthesis of <i>meta</i>-Terphenyls via [3 + 3] Annulation of Nitroallylic Acetates with Alkylidenemalononitriles
作者:Elumalai Gopi、Irishi N. N. Namboothiri
DOI:10.1021/jo501193h
日期:2014.8.15
A highly efficient one-pot method has been developed for the synthesis of meta-terphenyls via a regioselective [3 + 3] annulation-elimination sequence involving Morita–Baylis–Hillman (MBH) acetates of nitroalkenes and alkylidenemalononitriles. The reaction takes place in a regioselective manner under mild conditions (Et3N, room temperature) to afford a wide variety of meta-terphenyls bearing aryl,
已开发出一种高效的一锅法,该方法通过区域选择性[3 + 3]消除硝基的序列,涉及硝基链烯和烷基亚甲基丙二酸酯的森田-贝利斯-希尔曼(MBH)乙酸酯合成方法,来合成间三联苯。该反应在温和的条件下(Et 3 N,室温)以区域选择性的方式进行,从而得到各种带有芳基,杂芳基和苯乙烯基的间-三联苯基。这种新颖的[3 + 3]环空反应利用了MBH乙酸酯的1,3-双亲电特性和亚烷基丙二腈的1,3-双亲核特性,并以包括S N 2'取代,分子内6-内-trig的级联方式进行迈克尔加法和双重淘汰。还已经证明了产物的代表性合成转化,例如,转化为间-叔苯基衍生的异吲哚啉酮。
Visible-light driven electron–donor–acceptor (EDA) complex-initiated synthesis of thio-functionalized pyridines
作者:Hirendra Nath Dhara、Amitava Rakshit、Dinabandhu Barik、Koustuv Ghosh、Bhisma K. Patel
DOI:10.1039/d3cc01678a
日期:——
A visible-light-induced electron–donor–acceptor (EDA)-aggregated radical cyclization between (E)-2-(1,3-diarylallylidene)malononitriles and thiophenols leads to poly-functionalized thio pyridines.