巻号一覧
69 巻, 6 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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桑原 重文2011 年 69 巻 6 号 p. 645
発行日: 2011/06/01
公開日: 2011/08/10
ジャーナル オープンアクセスPDF形式でダウンロード (583K)
総説および総合論文
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鈴木（田中） 奈津美, 鈴木 孝洋, 松村 岳彦, 細谷 洋介, 中里 知幸, 中田 雅久2011 年 69 巻 6 号 p. 646-660
発行日: 2011/06/01
公開日: 2011/08/10
ジャーナル 認証ありAn enantioselective total synthesis of (−)-FR182877 is described. This total synthesis features 1) the one-pot stereoselective tandem IMDA-IMHDA reaction which affords the tetracyclic compound including the ABCD ring system of (−)-FR182877 with the correct new seven stereogenic centers, 2) the palladium-mediated 7-exo-trig intramolecular Heck reaction for the construction of the highly strained seven-membered F-ring, and 3) the iridium-mediated isomerization of the allylic alcohol to the α-methyl ketone followed by epimerization and the stereoselective reduction to furnish all the stereogenic centers of (−)-FR182877.抄録全体を表示PDF形式でダウンロード (1857K) -
山口 茂弘, 深澤 愛子2011 年 69 巻 6 号 p. 661-670
発行日: 2011/06/01
公開日: 2011/08/10
ジャーナル 認証ありIncorporation of main group elements into π-conjugated skeletons is a powerful strategy for the development of new π-electron materials with intriguing properties. An important direction in this chemistry may be to exploit synergistic effects of two or more main group elements, which enables us to construct new skeletons with unusual electronic structures. From this point of view, several kinds of π-conjugated molecules containing B, N, and P have been synthesized, including B-B bond-containing thiophene-fused 1,2-dihydro-1,2-diborin, B-N bond-incorporated π-extended 1,2-dihydro-1,2-azaborine, and several ladder-type π-conjugated compounds containing boron and phosphorus as the bridging moieties. In particular, some of the latter compounds have been synthesized based on newly developed intramolecular double cyclizations from o,o’-disubstituted diphenylacetylene precursors. Investigation on their structure-properties relationships revealed the effect of these main group elements on the electronic structures and thus their properties. Some of these compounds showed high potentials for applications as the electron-transporting materials and two-photon absorption materials.抄録全体を表示PDF形式でダウンロード (1853K) -
平岡 秀一2011 年 69 巻 6 号 p. 671-679
発行日: 2011/06/01
公開日: 2011/08/10
ジャーナル 認証ありExactly defined number of gear-shaped amphiphiles self-assemble into discrete aggregates. In water (or aqueous methanol) these amphiphiles mesh each other so as to reduce indented hydrophobic surface area exposed to the solvent, leading to 2 nm-sized cubic-shaped hexamers. Furthermore, tetrahedron-shaped tetramers are constructed from four gear-shaped amphiphiles and a guest molecule with the aid of van der Waals interaction between the amphiphiles and the guest molecule.抄録全体を表示PDF形式でダウンロード (2021K) -
小林 雄一2011 年 69 巻 6 号 p. 680-690
発行日: 2011/06/01
公開日: 2011/08/10
ジャーナル 認証ありThis review presents allylic substitution of the monoacetate of 4-cyclopentene-1,3-diol with organoborates/Ni cat reagents, copper-based reagents, and the modified malonate/Pd cat reagent to produce 4-substituted-2-cyclopenten-1-ols (1,4-isomers) or 2-substituted-3-cyclopenten-1-ols (1,2-isomers) highly stereo-and regioselectively. The groups installed to the monoacetate include alkyl, alkenyl, and aryl groups, which were previously unsuccessful. The high selectivity allows an access to a new class of cyclopentanoids such as jasmonoids and isoprostanes, which are described in the latter part of the review. One of the two side chains with the thermodynamically unstable cis orientation in the jasmonoids is constructed by using copper-based reagents giving the 1,4-isomers. In the synthesis of isoprostanes with the dienone structure, the side chain characterized by the cis allylic moiety is constructed by using the malonate/Pd cat reagent or propargylic-MgBr/CuCN reagent efficiently.抄録全体を表示PDF形式でダウンロード (2050K) -
水畑 吉行, 時任 宣博2011 年 69 巻 6 号 p. 691-704
発行日: 2011/06/01
公開日: 2011/08/10
ジャーナル 認証ありMetallaaromatic compounds, i.e., [4n+2] π ring systems containing a heavier group 14 element, have attracted much attention in recent decades, since they represent the heavier congeners of carbocyclic aromatic compounds, which play very important roles in organic chemistry. However, such metallabenzenoids have only been characterized in low-temperature matrices or postulated as transient intermediates in some trapping reactions.
Recently, we have succeeded in the synthesis of the first stable metallaaromatic compounds by taking advantage of efficient steric protection groups, 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl (Tbt) and 2,6-bis[bis(trimethylsilyl)methyl]-4-[tris(trimethylsilyl)methyl]phenyl group (Bbt), and revealed their properties systematically. In this paper, we report the synthetic studies on the kinetically stabilized metallaaromatic compounds and their properties.抄録全体を表示PDF形式でダウンロード (1878K) -
高口 豊, 田嶋 智之2011 年 69 巻 6 号 p. 705-714
発行日: 2011/06/01
公開日: 2011/08/10
ジャーナル 認証ありDendrimers or dendrons having chromophore at the core or focal point were synthesized, and effects of dendritic substituent on photofunctionality were investigated. We found photoisomerization from allyl alcohol to ketone by the use of dendrimer disulfide as catalyst. Various photooxygenation reactions proceeded by the use of Cd10S16 molecular cluster dendrimer or fullerodendron as photosensitizer of singlet oxygen. Photoinduced charge separation of fullerodendrimers take place with high quantum efficiency in aqueous solution. In the presence of viologen dication and a sacrificial donor, the persistent viologen radical cation was generated. This electron pooling efficiency was obviously enhanced by the use of single-walled carbon nanotube/fullerodendron supramolecular system.抄録全体を表示PDF形式でダウンロード (2062K)
Review de Debut
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薬師寺 文華2011 年 69 巻 6 号 p. 715-716
発行日: 2011/06/01
公開日: 2011/08/10
ジャーナル オープンアクセスThe amide bond formation was developed in the early 20th century, however, acylation of hindered or secondary amines still poses a significant challenge. Recently, novel two-component coupling reaction using old functional groups has been established for construction of tertiary amides. It is likely that careful reconsideration of known reactions might produce new valuable chemistry.抄録全体を表示PDF形式でダウンロード (665K)
十字路
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深澤 愛子, 平岡 秀一, 田嶋 智之2011 年 69 巻 6 号 p. 717
発行日: 2011/06/01
公開日: 2011/08/10
ジャーナル オープンアクセスPDF形式でダウンロード (591K)
反応機構演習
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横島 聡2011 年 69 巻 6 号 p. 719-720
発行日: 2011/06/01
公開日: 2011/08/10
ジャーナル 認証ありPDF形式でダウンロード (528K)
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