巻号一覧
71 巻, 4 号
選択された号の論文の10件中1～10を表示しています
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巻頭言
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淵上 寿雄2013 年 71 巻 4 号 p. 295
発行日: 2013/04/01
公開日: 2013/05/09
ジャーナル オープンアクセスPDF形式でダウンロード (780K)
総説および総合論文
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山本 芳彦2013 年 71 巻 4 号 p. 296-306
発行日: 2013/04/01
公開日: 2013/05/09
ジャーナル 認証ありIn the presence of catalytic amounts of copper salts, CuOAc or Cu(OAc)2, the reaction of arylboronic acids with electron-deficient alkynes proceeded in MeOH at ambient temperature to afford hydroarylation products with high chemo- and stereoselectivity. This method of synthesizing tri-substituted alkenes was further applied to the synthesis of biologically interesting molecules such as butenolides/pentenolides, 4-arylcoumarins, 3,3-diarylacrylonitriles, and 3-arylindole-2-carboxylates. Among them, the tandem hydroarylation/lactonization leading to 4-arylcoumarins is particularly fascinating as seven natural products were synthesized by the combination of three alkynoates and four boronic acids.
The copper-catalyzed conjugate addition was further extended to that of allylboronates as organoboron reagents. Thus, the copper-catalyzed conjugate allylation of various electron-deficient alkynes was achieved and the derivatization of the introduced allyl moiety was also investigated.抄録全体を表示PDF形式でダウンロード (1862K) -
清水 正毅2013 年 71 巻 4 号 p. 307-318
発行日: 2013/04/01
公開日: 2013/05/09
ジャーナル 認証ありThis account reviews our research on the development of palladium-catalyzed synthesis of silicon-bridged biaryls to which growing interest has been paid in materials science and on the design and characterization of the silicon-bridged biaryls that can be accessible via the palladium-catalyzed reactions we developed.抄録全体を表示PDF形式でダウンロード (2105K) -
坂口 聡2013 年 71 巻 4 号 p. 319-329
発行日: 2013/04/01
公開日: 2013/05/09
ジャーナル 認証ありThe Cu-catalyzed 1,4-addition of organometallic reagents to α,β-unsaturated compounds is a powerful method for the efficient construction of carbon-carbon bonds. In the past decade, catalytic asymmetric conjugate addition reactions with high enantioselectivities have been successfully achieved by using a variety of chiral ligands. Among the growing number of the chiral ligands, N-heterocyclic carbenes (NHCs) have been recognized as useful ligands. One of the most attractive features that make NHCs a very interesting class of ligands is the easy access to their ligand precursors (mostly azolium salts). The azolium salts are very easy to functionalize often by simple reactions that allows the design of a wide variety of NHC ligands and the rapid elaboration of NHC ligand libraries. In this review article, the Cu-catalyzed asymmetric conjugate addition reactions by employing easy accessible and highly tunable functionalized azolium salts are summarized.抄録全体を表示PDF形式でダウンロード (1673K) -
吾郷 友宏, 川島 隆幸2013 年 71 巻 4 号 p. 330-340
発行日: 2013/04/01
公開日: 2013/05/09
ジャーナル 認証ありFrom the viewpoint of the improvement of organic optoelectronic devices, including organic electroluminescence devices, organic solar cells, and organic field effect transistors, development of novel π-conjugated molecules with unique structures and properties should be of great importance. In the course of our study on functional π-systems by taking advantage of characteristics of main group elements, we have synthesized dibenzoheteraborin-based hetero-π-conjugated molecules. Rigid and planar π-backbones of the dibenzoheteraborin derivatives have been shown to enhance synergetic interactions between the main group elements. In this paper, syntheses and properties of the dibenzoheteraborin derivatives involving various main group elements, such as nitrogen, oxygen, phosphorus, sulfur, and selenium, are described.抄録全体を表示PDF形式でダウンロード (1874K) -
依光 英樹2013 年 71 巻 4 号 p. 341-354
発行日: 2013/04/01
公開日: 2013/05/09
ジャーナル 認証ありKetene dithioacetal monoxides (KDMs) bring out a variety of latent intriguing reactivity upon treatment with triflic anhydride. The extended Pummerer reactions of KDMs provide reliable accesses to heteroaromatic compounds including (benzo) furan, (benzo) thiophene, and pyrroles. Trifluoromethyl-substituted KDMs are useful building blocks to prepare α-trifluoromethyl carbonyl compounds and 3-trifluoromethyl heteroaromatic compounds. A newly uncovered interrupted Pummerer reaction/[3,3]sigmatropic rearrangement cascade is the key that realizes most of the transformations in this paper. The last part of this paper describes the first example of metal-catalyzed Pummerer reaction where sulfoxides are directly activated by the catalyst.抄録全体を表示PDF形式でダウンロード (2545K)
Review de Debut
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五東 弘昭2013 年 71 巻 4 号 p. 355-356
発行日: 2013/04/01
公開日: 2013/05/09
ジャーナル オープンアクセスSubstituted arenes are important building blocks for many natural products, medicines and materials. Functionalization of unactivated carbon-hydrogen (C-H) bonds is an efficient strategy for preparation of these compounds without substrate prefunctionalization. The traditional C-H activation methods utilized proximate heteroatom directing groups that direct selective cleavage of ortho C-H bonds and formconformationally rigid metallacycles. However, recent advances in the field have enabled meta-selective C-H functionalizations.抄録全体を表示PDF形式でダウンロード (1045K)
ラウンジ
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新谷 亮2013 年 71 巻 4 号 p. 357-364
発行日: 2013/04/01
公開日: 2013/05/09
ジャーナル 認証ありPDF形式でダウンロード (3561K)
十字路
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山本 芳彦, 清水 正毅, 吾郷 友宏, 川島 隆幸, 依光 英樹2013 年 71 巻 4 号 p. 365
発行日: 2013/04/01
公開日: 2013/05/09
ジャーナル オープンアクセスPDF形式でダウンロード (749K)
Let’s Challenge
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2013 年 71 巻 4 号 p. 366-368
発行日: 2013/04/01
公開日: 2013/05/09
ジャーナル 認証あり
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