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Juan C. Rodríguez‐Domínguez Alexander Balbuzano‐Deus Miguel A. López‐López Juan C. Rodríguez‐Domínguez Gilbert Kirsch 《Journal of heterocyclic chemistry》2007,44(1):273-275
An efficient two steps procedure for the synthesis of 1‐acetyl‐1H‐indol‐3‐yl acetates, starting from 2‐chlorobenzoic acids, was developed and in general, moderate to good yields were obtained 相似文献
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Many components make light work : A novel synthetic strategy for the preparation of pyridines and isoquinolines in high chemo‐ and regioselectivity has been developed. By manipulating the reaction conditions, either product can be generated smoothly in a highly efficient and atom‐economic manner (see scheme).
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Yan Lee Dr. Takehiko Ishii Dr. Horacio Cabral Dr. Hyun Jin Kim Ji‐Hun Seo Nobuhiro Nishiyama Dr. Hiroki Oshima Kensuke Osada Dr. Kazunori Kataoka Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(29):5309-5312
Special delivery! Polyionic complex (PIC) micelles that contain the charge‐conversional moieties citaconic amide or cis‐aconitic amide were developed for cytoplasmic protein delivery. The increase of the charge density on the protein cargo helped the stability of the PIC micelles without cross‐linking, and the charge‐conversion in endosomes induced the dissociation of the PIC micelles to result in efficient endosomal release (see picture).
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Andrey A. Fokin Prof. Dr. Boryslav A. Tkachenko Dr. Natalie A. Fokina Dr. Heike Hausmann Dr. Michael Serafin Dr. Jeremy E. P. Dahl Dr. Robert M. K. Carlson Dr. Peter R. Schreiner Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(15):3851-3862
Functionalized nanodiamonds : Various functional groups have been incorporated into the structures of the naturally occurring diamondoids [1(2)3]tetramantane and [12312]hexamantane (cyclohexamantane), which represent hydrogen‐terminated prism‐shaped nanodiamonds (see picture). The attachment points define the use of these diamond‐like molecules as geometric building blocks for a variety of applications.
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Atsuya Muranaka Dr. Osamu Matsushita Kengo Yoshida Shigeki Mori Dr. Masaaki Suzuki Dr. Taniyuki Furuyama Masanobu Uchiyama Prof. Dr. Atsuhiro Osuka Prof. Dr. Nagao Kobayashi Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(15):3744-3751
Expanded porphyrins : The electronic excited states of two forms of meso‐hexakis(pentafluorophenyl)‐substituted gold(III) hexaphyrin(1.1.1.1.1.1), such as that depicted, have been investigated by density functional calculations and magnetic circular dichroism spectroscopy to assign their low‐energy excited singlet states.
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Filipe J. S. Duarte Dipl.‐Chem. Eurico J. Cabrita Prof. Dr. Gernot Frenking Prof. Dr. A. Gil Santos Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(7):1734-1746
A rationalization of stereoselectivity : The mechanisms of proline‐catalyzed and imidazole‐co‐catalyzed intramolecular Baylis–Hillman reactions have been studied by using density functional theory methods. The computational data has allowed us to rationalize the experimental outcome, validating some of the mechanistic steps proposed in the literature, as well as to propose new ones that considerably change and improve our understanding of the full reaction path (see scheme).
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Doralyn S. Dalisay Dr. Tim Quach Dr. Gillian N. Nicholas Dr. Tadeusz F. Molinski Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(24):4367-4371
A dramatic effect is observed when acyclic N‐(2‐naphthamides) of medium‐chain 1‐amino‐2‐methylalkanes are partially ordered with the help of liposomes: the Cotton effect arising from π–π* transitions of the terminal naphthamide chromophor is enormously enhanced. This effect was exploited to assign the configuration of new polyketide peroxides such as 1 from the sponge Plakortis halichondroides.
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Tetyana Beryozkina Dr. Ksenia Boyko Natalya Khanduyeva Volodymyr Senkovskyy Dr. Marta Horecha Ulrich Oertel Dr. Frank Simon Dr. Manfred Stamm Prof. Anton Kiriy Dr. 《Angewandte Chemie (International ed. in English)》2009,48(15):2695-2698
Graft work : The first surface‐initiated and site‐specific palladium‐catalyzed Suzuki polycondensation that allows selective grafting and patterning of semiconducting and emissive poly[9,9‐bis(2‐ethylhexyl)fluorene] ( 1 ) at room temperature is developed (see scheme). The pattering is demonstrated by AFM (see image).
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Yue‐Biao Zhang Wei‐Xiong Zhang Fei‐Yue Feng Jie‐Peng Zhang Dr. Xiao‐Ming Chen Prof. 《Angewandte Chemie (International ed. in English)》2009,48(29):5287-5290
Making connections : A hydroxy‐centered trinuclear nickel cluster has been employed to construct a highly connected, highly symmetric framework with a uninodal nine‐connected topology. An array of triakis tetrahedra leads to a biporous intersecting‐channel system (see picture).
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Christophe Aronica Dr. Anna Venancio‐Marques Jérôme Chauvin Dr. Vincent Robert Dr. Gilles Lemercier Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(20):5047-5055
Finely tuned optical properties : The optical properties of substituted protected catechol derivatives can be fine‐tuned (see scheme; TBDMS=tert‐butyldimethylsilyloxy). The DFT‐calculated polarisabilities are compared with experimental data.
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Victoria E. Campbell Xavier de Hatten Dr. Nicolas Delsuc Dr. Brice Kauffmann Dr. Ivan Huc Dr. Jonathan R. Nitschke Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(25):6138-6142
Systemic change : A system of transformations between helical structures was observed to be governed by interactions mediated by the electronic effects of substituents, entropic effects, the conformational preferences of organic building blocks, and the coordinative preferences of the metal ion. All of these effects were important, but all must be considered together to allow the prediction of the product observed (see scheme).
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Nobutaka Ototake Masashi Nakamura Yasuo Dobashi Prof. Haruhiko Fukaya Osamu Kitagawa Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(20):5090-5095
Going separate ways : By using π‐allyl–palladium chemistry (path A) and PdII‐catalyzed Claisen chemistry (path B), a highly selective stereodivergent synthesis of separable amide rotamers was achieved (see scheme).
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Hai‐Hua Lu Hui Liu Dr. Wei Wu Xu‐Fan Wang Liang‐Qiu Lu Wen‐Jing Xiao Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(12):2742-2746
Economical approach : The first organocatalytic asymmetric intramolecular hydroarylation of phenol‐ and aniline‐derived enals offers one of the most straightforward and atom‐economic approaches to enantioriched chromans and tetrahydroquinolines (up to 96 % ee; see scheme).
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Alena Rudolph Mark Lautens Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(15):2656-2670
Secondary, but second to none : The use of secondary alkyl halides in transition‐metal‐catalyzed cross‐coupling reactions (see scheme) has advanced significantly over the last five years. Selected examples of these transformations are examined, including mechanistic and stereochemical aspects.
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Rocío Ponce Ortiz Dr. Juan Casado Prof. Víctor Hernández Prof. Juan T. López Navarrete Prof. Joseph A. Letizia Dr. Mark A. Ratner Antonio Facchetti Prof. Tobin J. Marks Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(20):4959-4959
Molecular semiconductors in the guise of three diazine‐functionalized oligothiophenes have been synthesized and their structural, optical, vibrational, electrochemical, and semiconductor properties studied. In their Full Paper on page 5023 ff. , J. T. López Navarrete, A. Facchetti, T. J. Marks et al. describe how these diazine‐functionalized oligothiophenes are reasonably efficient hole transporters.
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Herbert Meier Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(22):3911-3913
En route to molecular electronics : As extended, conjugated oligomers are desirable for molecular electronics, their electrical conductance should display a low attenuation factor. Zinc‐complexed oligo(ethynyleneporphyrindiylethynylene)s have been prepared that are distinguished by ultralow attenuation factors in single‐molecule conductance.