巻号一覧
70 巻, 6 号
選択された号の論文の11件中1～11を表示しています
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巻頭言
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小坂田 耕太郎2012 年 70 巻 6 号 p. 579
発行日: 2012/06/01
公開日: 2012/07/02
ジャーナル オープンアクセスPDF形式でダウンロード (801K)
総説および総合論文
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中村 達2012 年 70 巻 6 号 p. 581-592
発行日: 2012/06/01
公開日: 2012/07/02
ジャーナル 認証ありπ-Acidic metal-catalyzed cyclization reaction is one of the most efficient methods to construct highly elaborate molecular skeletons in a single operation under mild reaction conditions. These transformations often involve cleavage of σ bonds. Investigations into catalytic skeletal rearrangement have mainly utilized alkynylamines, alkynylalcohols, enynes, and propargylic esters as substrates. In this article, I report our recent findings on π-acidic metal-catalyzed reactions via cleavage of σ bonds between major elements in body, such as carbon, nitrogen, oxygen, and sulfur, producing multisubstituted heterocycles in an atom-efficient manner. That is, (a) catalytic carbon-heteroatom bond addition of ortho-alkynylphenyl ethers, -anilines, and -phenyl sulfides and (b) catalytic skeletal rearrangement of O-propargylic oximes.抄録全体を表示PDF形式でダウンロード (1954K) -
荒江 祥永, 小笠原 正道2012 年 70 巻 6 号 p. 593-605
発行日: 2012/06/01
公開日: 2012/07/02
ジャーナル 認証ありAlthough “central chirality” based on stereogenic carbon atoms is arguably the most common chiral element in organic chemistry, chiral molecules devoid of stereogenic centers play important roles in stereoselective organic transformations. Among these chiral compounds with “non-centrochirality”, planar-chiral transition-metal complexes have been utilized as chiral ligands, chiral catalysts, or chiral building blocks in asymmetric synthesis. However, enantiomerically enriched forms of these compounds are primarily obtained by rather classical methods. Examples of catalytic enantioselective induction of planar-chirality in transition-metal species have been extremely rare and still a developing area in this field. In this review article, catalytic asymmetric synthesis of various “planar-chiral transition-metal complexes” are surveyed in a comprehensive manner.抄録全体を表示PDF形式でダウンロード (2027K) -
稲木 信介, 淵上 寿雄2012 年 70 巻 6 号 p. 606-614
発行日: 2012/06/01
公開日: 2012/07/02
ジャーナル 認証ありElectron-transfer behaviors of conjugated polymers on electrode (electrochemical doping) have been studied well for the purpose of electrochemical device applications such as conducting material and electrochromic material. In this study, we treated a charged (doped) state of conjugated polymers as an intermediate for following chemical reactions based on the concept of electroorganic synthesis. The post-functionalization of conjugated polymers was successfully achieved when a reactive dopant (conter ion derived from electrolyte) was used for the electrochemical reactions. For example, the polymer reactions such as anodic halogenations, cathodic reduction, and gradient oxidation reaction on bipolar electrode were successfully carried out to tune the optical and electrochemical properties of the polymers.抄録全体を表示PDF形式でダウンロード (2148K) -
山岡 具倫, 市川 善康, 小槻 日吉三2012 年 70 巻 6 号 p. 615-628
発行日: 2012/06/01
公開日: 2012/07/02
ジャーナル 認証ありPietra and co-workers reported isolation of (−)-agelastatins A and B from the deep water marine sponge Agelas dendromorpha collected in the Coral Sea near New Caledonia. The structure of these alkaloids featuring the architecturally unique tetracyclic array, coupled with their significant biological activity and scarce availability from marine organisms, has stimulated the synthetic community, resulting in inventive syntheses from eleven different research groups. In this review, these synthetic studies of agelastatin A showcasing elegant and powerful modern synthetic methodologies, are summarized.抄録全体を表示PDF形式でダウンロード (2393K) -
俣野 善博, 今堀 博2012 年 70 巻 6 号 p. 629-639
発行日: 2012/06/01
公開日: 2012/07/02
ジャーナル 認証ありPhosphole has a low aromaticity and exhibits characteristic optical and electrochemical properties derived from the phosphorus-bridged 1,3-diene π system. In addition, phosphole has an active lone pair at phosphorus. The most remarkable feature of the phosphole-based π-systems is that their fundamental properties are tunable by chemical functionalizations at the phosphorus center. In this regard, phosphole-based π-systems are now regarded as one of the future materials for use in optoelectronics. In this article, we would like to briefly summarize our recent results on the synthesis of novel π-conjugated phosphole derivatives with representative examples, which contain phosphole-vinylene, phosphole-acetylene, phosphole-heterole, phosphole-benzene, phosphole-phosphole, benzo[c]phosphole, acenaphtho[c]phoshole, and diacenaphtho[b,d]phosphole skeletons. The target compounds were successfully prepared by two main approaches, titanacycle method and Stille coupling. Selected structural, optical, and electrochemical data for a few derivatives are also presented. The results described herein would give valuable information and guidelines for designing phosphole-based opto-electrochemical materials.抄録全体を表示PDF形式でダウンロード (1947K) -
上遠野 亮, 河合 英敏, 藤原 憲秀, 鈴木 孝紀2012 年 70 巻 6 号 p. 640-650
発行日: 2012/06/01
公開日: 2012/07/02
ジャーナル 認証ありThis article describes the chirality sensing systems based on changes in conformation of dynamic terephthalamide hosts from a nonhelical form to a helical form with biasing to prefer one handedness upon complexation with a chiral guest through supramolecular transmission of chirality. The syn form is endowed with the ability to capture a ditopic guest through hydrogen bonds at the amide carbonyls; thus in a complexed state, a strong CD signal is produced thanks to a helical conformation induced by the conformational change and a biased handedness. Attachment of chirality to the terephthalamide host itself leads to an intrinsic preference in the sense of dynamic helicity in a helical syn form. Cooperative transmission of chiralities within the host and from the guest enables to further design an advanced sensing system with stereospecific chiroptical modulation, based on a stereospecific change in conformation of the chiral dynamic host upon complexation with a pair of enantiomeric guests.抄録全体を表示PDF形式でダウンロード (2122K)
Review de Debut
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江上 寛通2012 年 70 巻 6 号 p. 651-652
発行日: 2012/06/01
公開日: 2012/07/02
ジャーナル オープンアクセスEven in recent days, the SN2 reaction on vinylic carbons is not very common. This reaction pathway has been considered as an unlikely mechanism for a long time. However, recent investigations clearly indicate that nucleophilic attack on the σ* orbital of Csp2-LG bond is viable. In this short review, representative examples of this type of reaction are outlined.抄録全体を表示PDF形式でダウンロード (972K) -
小野 公輔2012 年 70 巻 6 号 p. 653-654
発行日: 2012/06/01
公開日: 2012/07/02
ジャーナル オープンアクセスNanoporous materials are important in applications such as molecular separations, catalysts and gas storage. Metal-organic frameworks (MOFs), covalent organic frameworks (COFs), and nanoporous polymers have dominated this research area. By contrast, discrete organic molecules tend to pack efficiently in solid state, leaving as little empty space as possible, which leads to non-porous materials. This review will highlight the recent developments with discrete organic cage molecules that are porous in solid state.抄録全体を表示PDF形式でダウンロード (2280K)
ラウンジ
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井澤 雄輔2012 年 70 巻 6 号 p. 655-661
発行日: 2012/06/01
公開日: 2012/07/02
ジャーナル 認証ありThe story of the development for Pd mediated aerobic oxidation reactions in Stahl laboratory was described. The use of electron-deficient ligand has been found to achieve unprecedented levels of reactivity at lower temperature in aromatic C-H activation. This type of ligand enables us to demonstrate versatile and efficient strategy for the synthesis of substituted aromatic molecules via aerobic dehydrogenation of six-membered ring.抄録全体を表示PDF形式でダウンロード (2287K)
十字路
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中村 達, 稲木 信介, 淵上 寿雄, 俣野 善博2012 年 70 巻 6 号 p. 662
発行日: 2012/06/01
公開日: 2012/07/02
ジャーナル オープンアクセスPDF形式でダウンロード (731K)
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