Negishi reaction in BODIPY dyes. Unprecedented alkylation by palladium-catalyzed C–C coupling in boron dipyrromethene derivatives
作者:Gonzalo Duran-Sampedro、Eduardo Palao、Antonia R. Agarrabeitia、Santiago de la Moya、Noël Boens、María J. Ortiz
DOI:10.1039/c4ra00651h
日期:——
Negishi reactions of 3-halogen and 3,5-dihalogen substituted BODIPYs with different organozinc reagents are reported as the first examples of this valuable palladium-catalyzed C–C coupling reaction into the family of the BODIPY dyes. It is demonstrated that the Negishi coupling is especially useful for obtaining interesting alkylated BODIPYs, including synthetically-valuable asymmetrically-3,5-disubstituted
optical properties of the conjugated BODIPY- fluorene copolymers although they don't affect the polymerization process. The absorption and emission peaks of P1 exhibit red shifts compared to those of P2 and P3. The polymers show good nonlinear optical properties that are closely related to the connection sites of the BODIPY pendants. P1 exhibits relatively richer nonlinear optical (NLO) properties than
一系列的4,4-二氟-4-硼-3-一个,4一个二氮杂-s-引达省(BODIPY)使用不同的连接位点和共轭长度和芴交替共轭聚合物已通过钯催化的Suzuki偶联反应合成。聚合物通过1 H NMR光谱和凝胶渗透色谱(GPC)进行了充分表征,并通过热重分析(TGA),紫外可见吸收光谱,循环伏安(CV),光致发光(PL)光谱,Z扫描技术,以及使用密度泛函理论(DFT)方法的理论计算。结果表明,BODIPY的连接部位和共轭长度对共轭BODIPY-芴共聚物的光电和非线性光学性质有很大影响,尽管它们不影响聚合过程。与P2和P3相比,P1的吸收和发射峰呈现出红移。该聚合物表现出良好的非线性光学性质,与BODIPY悬垂物的连接部位密切相关。与P2和P3相比,P1表现出相对更丰富的非线性光学(NLO)特性。P1的三阶非线性光学系数(χ (3))为3.57×10 -11 esu,约为P2和P3的四倍。
Polyarylated boron-dipyrromethenes containing three different types of aryl groups
作者:Vellanki Lakshmi、Mangalampalli Ravikanth
DOI:10.1039/c4ra06912a
日期:——
synthesis and properties of the first examples of four novel multiply hexaarylated boron-dipyrromethenes (BODIPYs) containing three different types of aryl groups on each pyrrole ring of BODIPY. The BODIPYs were synthesized over a sequence of steps of bromination followed by Suzuki coupling with arylboronic acids. All reactions worked smoothly and we isolated the multiply polyarylated BODIPYs as stable
Synthesis of Hexasubstituted Boron-Dipyrromethenes Having a Different Combination of Substituents
作者:Vellanki Lakshmi、Mangalampalli Ravikanth
DOI:10.1002/ejoc.201402599
日期:2014.9
sterically crowded, mixed hexasubstituted BODIPYs containing two different types of substituents on the pyrrole carbons have been synthesized in high yields by a stepwise approach. The mixed BODIPYs were synthesized by bromination of BODIPYs followed by coupling with appropriate boronic acids under Suzuki coupling conditions. This approach has allowed the introduction of two different types of methyl/aryl