A brand-new Pd-mediated generation of benzyne and its [2+2+2] cycloaddition: δ-carbon elimination and concomitant decarboxylation
摘要:
We found a brand-new method for the generation of aryne from methyl 2-bromobenzoates via the Pd-mediated concomitant delta-carbon elimination and decarboxylation. The generated arynes underwent Pd-mediated [2+2+2] cycloaddition to give triphenylenes. (C) 2008 Elsevier Ltd. All rights reserved.
Photo-induced Carboiodination: A Simple Way to Synthesize Functionalized Dihydrobenzofurans and Indolines
作者:Xiaobo Yang、Wenbo Liu、Lu Li、Wei Wei、Chao-Jun Li
DOI:10.1002/chem.201603608
日期:2016.10.17
readily available and cheap aryl bromides and sodium iodide as the starting materials to synthesize valuable functionalized dihydrobenzofurans and indolines in good to excellent yields with broad functional‐group compatibility. As examples to demonstrate the utility of this protocol, gram‐scale reactions and further transformations of the products were accomplished towards the synthesis of bioactive
An unprecedented three-component coupling involving arynes, allyl bromides, and CO2 is described, providing efficient and facile access to structurally diverse ortho-brominated aryl esters. Unlike the conventional role played in organic synthesis as electrophiles, organic bromides served as nucleophiles in this reaction, affording a new approach to multicomponent reactions (MCRs) involving aryne intermediates
Rhenium-catalyzed allylation of C–H bonds of benzoic and acrylic acids
作者:Yoichiro Kuninobu、Kazuhiro Ohta、Kazuhiko Takai
DOI:10.1039/c1cc12359a
日期:——
We have succeeded in the allylation of aromatic and olefinic CâH bonds of benzoic and acrylic acids using a rhenium catalyst, Re2(CO)10. In this reaction, isomerization of the introduced allyl group to the 1-propenyl group did not occur.
[EN] RADICALLY POLYMERIZABLE SULFUR-CONTAINING COMPOUND AND RADICALLY POLYMERIZABLE SULFUR-CONTAINING POLYMER<br/>[FR] COMPOSE POLYMERISABLE PAR VOIE RADICALAIRE, CONTENANT DU SOUFRE, ET POLYMERE POLYMERISABLE PAR VOIE RADICALAIRE, CONTENANT DU SOUFRE
申请人:SHOWA DENKO KK
公开号:WO2006033438A1
公开(公告)日:2006-03-30
The invention relates to a radically polymerizable sulfur-containing compound having a group represented by formula (1) and at least one selected from among groups represented by formulae (2) to (4) , a radically polymerizable sulfur-containing polymer obtained by subjecting the compound to cationic ring-opening (co)polymerization, production process thereof, a composition containing the sulfur-containing compound and/or the sulfur-containing polymer, and a cured product obtained from the composition……………. (1)(2) (3) (4)………….( R1 to R6 each independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.) The cured product obtained from the radically polymerizable sulfur-containing compound and the radically polymerizable sulfur-containing polymer having a high refractive index is useful as an optical material, especially for lens material.