Synthesis of 2,3-diiodoindenes and their applications in construction of 13H-indeno[1,2-l]phenanthrenes
摘要:
A series of 2,3-diiodoindene were synthesized at first, and 13H-indeno[1,2-l]phenanthrenes were then constructed via a Suzuki coupling reaction and subsequently a Scholl reaction. Structures of synthesized compounds were fully characterized by H-1 NMR, C-13 NMR, and HRMS. Their photophysical properties, such as UV-vis and FL spectra were investigated, and electronic properties were theoretically calculated by the software of Gaussian 03. The results suggested that these modified indene and indenophenanthrene compounds might have potential applications as light emitting materials. (C) 2012 Elsevier Ltd. All rights reserved.
A palladium‐catalyzed cross‐coupling reaction between C(sp) and C(sp3) centers was achieved in excellent yields via C–C bond cleavage and C–O bond cleavage. The method uses benzylic carbonates and also avoids the involvement of benzyl halides, making it more practical in organic synthesis.
An efficient protocol of Rh(III)-catalyzed oxidative cyclization of benzoic acids with propargyl alcohols to give substituted isocoumarins under mild conditions was reported. A variety of substrates were applied in this reaction in yields up to 89%.
Dual Palladium/Copper-Catalyzed <i>anti</i>-Selective Intermolecular Allenylsilylation of Terminal Alkynes: Entry to (<i>E</i>)-Silyl Enallenes
作者:Liang-Feng Yang、Qiu-An Wang、Jin-Heng Li
DOI:10.1021/acs.orglett.1c02364
日期:2021.8.20
three-component trans-allenylsilylation of terminalalkynes with propargyl acetates and PhMe2SiBpin is described, which is driven by the regioselective allenylation of the alkyne with propargyl acetates and then silylation. This method allows the simultaneous incorporation of an allene and silicon across the C≡C bond and provides a highly chemo-, regio-, and stereoselective alkyne difunctionalization route to the
描述了钯/铜共催化的末端炔烃与乙酸炔丙酯和 PhMe 2 SiBpin 的三组分反式烯丙基甲硅烷基化反应,其由炔烃与乙酸炔丙酯的区域选择性烯丙基化和甲硅烷基化驱动。该方法允许通过 C≡C 键同时引入丙二烯和硅,并为合成有价值的 ( E )-甲硅烷基烯丙二烯提供了高度化学选择性、区域选择性和立体选择性的炔双官能化途径。生物活性化合物的后期衍生化突出了该方法的实用性。
Iridium-Catalyzed Cyclative Indenylation and Dienylation through Sequential B(4)–C Bond Formation, Cyclization, and Elimination from <i>o</i>-Carboranes and Propargyl Alcohols
作者:Yonghyeon Baek、Kiun Cheong、Gi Hoon Ko、Gi Uk Han、Sang Hoon Han、Dongwook Kim、Kooyeon Lee、Phil Ho Lee
DOI:10.1021/jacs.0c02121
日期:2020.6.3
indenylation through sequential B(4)-C and intramolecular C-C bond formation from o-carboranes and propargyl alcohols, leading to the formation of B(4)-indenylated-o-carboranes with excellent regioselectivity via direct B-H activation. Moreover, the iridium-catalyzed regioselective 1,3-dienylation has been accessed through sequential B-H activation, dehydration, and decarboxylation, producing B(4)-dienylated-o-carboranes