我们报道了一种通过2-酰基苯甲酸的羰基双官能化合成 3,3'-二取代异苯并呋喃-1(3 H )-酮的方法。一系列亲核试剂与 2-酰基苯甲酸反应以提供功能化的异苯并呋喃-1(3 H )-酮,实际产率范围为 61-96%。该反应使用 Cs 0.5 H 2.5 PW 12 O 40作为催化剂并产生水作为唯一的副产物。各种官能团可以通过以下方式引入到 isobenzofuran-1(3 H ) -one 骨架C-P/C-N/C-O/C-C 键的形成,这将为合成潜在的生物活性分子提供机会。在初步实验的基础上,提出了一种合理的机制。
我们报道了一种通过2-酰基苯甲酸的羰基双官能化合成 3,3'-二取代异苯并呋喃-1(3 H )-酮的方法。一系列亲核试剂与 2-酰基苯甲酸反应以提供功能化的异苯并呋喃-1(3 H )-酮,实际产率范围为 61-96%。该反应使用 Cs 0.5 H 2.5 PW 12 O 40作为催化剂并产生水作为唯一的副产物。各种官能团可以通过以下方式引入到 isobenzofuran-1(3 H ) -one 骨架C-P/C-N/C-O/C-C 键的形成,这将为合成潜在的生物活性分子提供机会。在初步实验的基础上,提出了一种合理的机制。
medicinal agents and bioactive alkaloids. Herein we report a broadly applicable synthesis of enantioenriched NH lactams through a one-pot asymmetric reductive amination/cyclization sequence of easily available keto acids/esters. Such cascade processes alleviate the demand for protecting group manipulations as well as intermediate purification. This strategy is capable of constructing enantioenriched lactams
Diverse privileged <i>N</i>-polycyclic skeletons accessed from a metal-free cascade cyclization reaction
作者:Wenzhong Li、Yu Wang、Huijing Qi、Ran Shi、Jiazhu Li、Si Chen、Xin-Ming Xu、Wei-Li Wang
DOI:10.1039/d1ob01206a
日期:——
An exquisite metal-free cascade cyclizationreaction of 2-acylbenzoic acids with amines was developed, which provided a powerful method for the one-potsynthesis of diverse isoindoloisoquinoline and benzoindolizinoindole derivatives. This protocol avoided the use of metal catalysts, proceeded with high efficiency and had broad substrate scope. These resulting products could be transformed into tertiary
An efficient N-centered radical intramolecular cyclizationreaction of alkenyl amides induced by visible light was described. In this process, an alkenyl amide underwent 5-exo/6-endo cyclization to selectively yield two critical alkaloid structures, namely isoindolinones and isoquinolinones.
Intramolecular Arylation of Tertiary Enamides through Pd(OAc)<sub>2</sub>-Catalyzed Dehydrogenative Cross-Coupling Reaction: Construction of Fused <i>N</i>-Heterocyclic Scaffolds and Synthesis of Isoindolobenzazepine Alkaloids
作者:Wenju Zhu、Shuo Tong、Jieping Zhu、Mei-Xiang Wang
DOI:10.1021/acs.joc.9b00010
日期:2019.3.1
Pd(OAc)2-catalyzed intramolecular dehydrogenative cross-coupling reaction between tertiaryenamides, which were derived from the condensation of 2-arylethylamines and methyl o-acetylbenzoate, and arenes enabled synthesis of 7,8-dihydro-5H-benzo[4,5]azepino[2,1-a]isoindol-5-one derivatives under mild conditions. The synthetic method was applied in the total synthesis of aporhoeadane alkaloids palmanine
Pd(OAc)2催化叔烯酰胺之间的分子内脱氢交叉偶联反应,后者是由2-芳基乙胺与邻乙酰基苯甲酸甲酯的缩合反应生成的,而芳烃则可以合成7,8-二氢-5 H-苯并[4] ,5] azepino [2,1 - a ] isoindol-5-one衍生物在温和的条件下。该合成方法仅需三到四个步骤即可用于阿魏酸钠,生物碱棕榈碱,伦诺沙明和邻苯二胺的全合成。