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.
Palladium(II)/N-Heterocyclic Carbene-Catalyzed Regioselective Heteroannulation of Tertiary Propargyl Alcohols and<i>o</i>-Haloanilines to form 2-Alkenylindoles
Monometallic and bimetallic palladium(II)/N‐heterocyclic carbene complexes appended with naphthalimide or bisnaphthalimide moieties were designed, synthesized, and characterized. Employment of these catalysts brings about the step‐economic and regioselective heteroannulation of tertiary propargyl alcohols with o‐haloanilines resulting in biologically and pharmaceutically relevant 2‐alkenylindoles. Basis
6-endo-dig cyclization of S-aryl propargyl sulfides to afford 2H-thiochromenes. The substitution at the propargylic position plays a crucial role in allowing intramolecular silver-catalyzed alkyne hydroarylation and N-iodosuccinimide-promoted iodoarylation. Additionally, a PTSA-catalyzed thiolation reaction of propargylicalcohols was developed to synthesize the required tertiary S-aryl propargyl ethers. The
这部作品描述了6-内-挖的环小号芳炔硫化物,提供2 ^ h -thiochromenes。炔丙基位置的取代在允许分子内银催化的炔烃氢化芳基化和N-碘代琥珀酰亚胺促进的碘芳基化中起着至关重要的作用。此外,还开发了 PTSA 催化的炔丙醇硫醇化反应,以合成所需的叔S-芳基炔丙基醚。通过合成视黄酸受体拮抗剂 AGN194310 证明了合并这两种方法的适用性。
Perfluoro-tagged, phosphine-free palladium nanoparticles supported on silica gel: application to alkynylation of aryl halides, Suzuki–Miyaura cross-coupling, and Heck reactions under aerobic conditions
cross-coupling, as well as in the Heck reaction between methyl acrylate and aryl iodides is described. The reactions are carried out under aerobic and phosphine-free conditions with excellent to quantitative product yields in each case. The catalysts are easily recovered and reused several times without significant loss of activity. The alkynylation of aryl halides (under copper-free conditions) and the Suzuki–Miyaura
Regioselective Synthesis of 2-Alkenylindoles and 2-Alkenylindole-3-carboxylates through the Cascade Reactions of <i>N</i>-Nitrosoanilines with Propargyl Alcohols
作者:Xia Song、Cai Gao、Bin Li、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.joc.8b01098
日期:2018.8.3
In this paper, a novel and efficient synthesis of 2-alkenylindoles and 2-alkenylindole-3-carboxylates via the cascade reactions of N-nitrosoanilines with propargyl alcohols is presented. Mechanistically, the formation of the title compounds is triggered by a Rh(III)-catalyzed C(sp2)–H alkenylation of N-nitrosoaniline with propargyl alcohol followed by the simultaneous intramolecular amination/cyclization