Facile Sc(OTf)<sub>3</sub>-Catalyzed Generation and Successive Aromatization of Isobenzofuran from <i>o</i>-Dicarbonylbenzenes
作者:Yuta Nishina、Tatsuya Kida、Tomonari Ureshino
DOI:10.1021/ol201479p
日期:2011.8.5
Isobenzofuran can be prepared from o-phthalaldehyde using hydrosilane. The formed isobenzofuran is trapped by an alkene via a Diels–Alder reaction. Further dehydration proceeds to furnish the conjugated aromatic compound. This multistep reaction was promoted by catalytic amounts of Sc(OTf)3.
Harnessing the reactivity of <i>ortho</i>-formyl-arylketones: base-promoted regiospecific synthesis of functionalized isoquinolines
作者:Pawan K. Mishra、Shalini Verma、Manoj Kumar、Ankit Kumar、Akhilesh K. Verma
DOI:10.1039/c9cc03689j
日期:——
An efficient and base-mediated one-pot regiospecificsynthesis of structurally diversified isoquinolines and benzo[h] isoquinolines from easily accessible ortho-formyl-arylketones and aryl/(het)arylmethanamines has been described. Challenging 3-alkynyl/alkenyl isoquinolines and bis-isoquinolines were easily attained through this developed chemistry, which can be further used for various organic transformations
已经描述了由容易获得的邻甲酰基-芳基酮和芳基/(杂)芳基甲胺有效和碱介导的一锅区域特异性合成结构上多样化的异喹啉和苯并[ h ]异喹啉。通过这种发达的化学方法很容易获得具有挑战性的3-炔基/烯基异喹啉和双异喹啉,它们可进一步用于各种有机转化。操作简便,高原子经济性,广泛的底物范围,官能团耐受性和对大规模合成的适用性是此开发方法的优势。
Synthesis and characterizations of conjugated copolymers containing benzo[f]isoindole-1,3-dione and diketopyrrolopyrrole units
作者:Duo Li、Gang Qian、Zhi Yuan Wang
DOI:10.1016/j.polymer.2013.07.049
日期:2013.10
A weak electron acceptor, 4,9-bis(5-bromothiophen-2-y1)-2-(2-ethylhexyl)-benzonsoindole-1,3-dione (BIDO) was designed and synthesized. Polymer P1 derived from BIDO and 9,9-dioctylfluorene-2,7diboronic acid bis(1,3-propanediol) ester by Suzuki cross-coupling reaction has a band gap of 2.41 eV. To expand the absorption range, a different amount of BIDO was copolymerized with a diketopyrrolopyrrole monomer to produce a series of copolymers Pa-c. The optical properties, electrochemical behavior, and energy levels of these four copolymers were investigated. The photovoltaic properties copolymers Pa-c were studied. A photovoltaic device containing P-c and [70]PCBM with a ratio of 1:2 had a power conversion efficiency of 1.17%. (C) 2013 Elsevier Ltd. All rights reserved.