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Xiaogang Liu Prof. 《Angewandte Chemie (International ed. in English)》2009,48(17):3018-3021
Hex nut : An emerging synthetic approach based on metal–organic coordination‐polymer templates has been used to fabricate micro‐ and nanoscale crystals. By using a diverse range of molecular building blocks coupled with conventional synthetic techniques, it is possible to synthesize ZnO crystals with tailored sizes, shapes (such as hexagonal rings; see figure), and surface properties.
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Arjan Odedra Dr. Peter H. Seeberger Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(15):2699-2702
Continuous organocatalysis : Fast aldol and Mannich reactions require less catalyst when conducted in a microreactor. A proline tetrazole derivative (5–10 mol %) catalyzes asymmetric aldol reactions between various aromatic aldehydes and ketones in microreactor at 60 °C with reaction times ranging from 10 to 30 min.
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Changfeng Wu Barbara Bull Kenneth Christensen Prof. Jason McNeill Prof. 《Angewandte Chemie (International ed. in English)》2009,48(15):2741-2745
It makes sense : Conjugated polymer nanoparticles doped with a platinum porphyrin dye exhibit bright phosphorescence that is highly sensitive to the concentration of molecular oxygen. The small size, extraordinary brightness, excellent sensitivity, and ratiometric emission, together with the demonstration of single‐particle sensing and cellular uptake, indicate the potential of the nanoparticle sensors for quantitative mapping of local molecular oxygen concentration.
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Merle Arrowsmith Michael S. Hill Dr. Dugald J. MacDougall Dr. Mary F. Mahon Dr. 《Angewandte Chemie (International ed. in English)》2009,48(22):4013-4016
High‐de‐hydride! A straightforward reaction between a magnesium silylamido/N‐heterocyclic carbene adduct and phenylsilane provides a {Mg4H6} cluster molecule that may be regarded as a combination of two magnesium dihydride and two magnesium monohydride moieties.
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Harsha E. Rajapakse D. Rajasekhar Reddy Dr. Shabnam Mohandessi Nathaniel G. Butlin Dr. Lawrence W. Miller Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(27):4990-4992
Brilliance of terbium : Heterodimeric conjugates of trimethoprim covalently linked to sensitized terbium chelates bind to Escherichia coli dihydrofolate reductase fusion proteins with nanomolar affinity (see picture). Terbium luminescence enables sensitive and time‐resolved detection of labeled proteins in vitro and on the surface of living mammalian cells.
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Guillaume Berthon‐Gelloz Dr. Mélanie Marchant Bernd F. Straub Prof. Dr. Istvan E. Marko Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(12):2923-2931
Pd 0 does the trick! Alkenyl silanes are efficiently cyclopropanated by diazoalkanes at low Pd loadings (see scheme). Clear evidence for the involvement of a Pd0 resting state for this reaction is given.
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K. C. Nicolaou Prof. Dr. Yee Hwee Lim Jochen Becker Dr. 《Angewandte Chemie (International ed. in English)》2009,48(19):3444-3448
An‐T‐biotic : The first total synthesis of the T‐shaped bisanthraquinone natural product BE‐43472B was accomplished and its absolute configuration assigned. Key transformations in the pivotal cascade sequence include a Diels–Alder reaction, a hemiketal formation, and a nucleophilic aromatic ipso substitution.
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Hao Qi Brandy Kinkead Vanessa M. Marx Huai R. Zhang Dr. Torsten Hegmann Dr. 《Chemphyschem》2009,10(8):1211-1218
Against the rule: Liquid crystal hosts ( 5CB and 8CB ) are doped with different thiol decorated gold nanoparticles (see figure). The “simple” hexanethiol and dodecanethiol capped nanoparticles ( Au1 and Au2 ) are more compatible to the nematic cyanobiphenyl liquid crystals than nanoparticles capped simultaneously with alkylthiols and a nematic cyanobiphenyl thiol ( Au3 and Au4 ).
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Takuya Hashimoto Dr. Kazuki Sakata Keiji Maruoka Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(27):5014-5017
Going through the phases : The title reaction was found to proceed by an initial base‐mediated isomerization to allenyl esters and subsequent phase transfer catalyzed alkylation at the α position of the ester (see scheme).
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Taichi Kano Dr. Yukako Yamaguchi Keiji Maruoka Prof. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(27):6678-6687
Amino sulfonamide catalyst : A distal proton of the axially chiral amino sulfonamide (S)‐ 1 realized the opposite diastereoselectivity in Mannich and cross‐aldol reactions compared with that observed in proline‐catalyzed reactions. The reactions catalyzed by (S)‐ 1 proceeded smoothly to give the anti‐Mannich and syn‐aldol adducts in excellent enantioselectivity (see scheme).
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Mohamed E. El‐Khouly Dr. Jung Hoon Kim Dr. Kwang‐Yol Kay Prof. Dr. Chan Soo Choi Dr. Osamu Ito Prof. Dr. Shunichi Fukuzumi Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(21):5301-5310
Fast moving : A new pentad (see figure) composed of silicon phthalocyanine (SiPc), as electron donor, that is connected with two units of naphthalenediimide (NDI) and fullerene C60, as electron acceptors, undergoes fast and efficient charge‐separation processes via the NDI and SiPc singlet excited states.
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Yasuhiro Uozumi Prof. Dr. Yutaka Matsuura Dr. Takayasu Arakawa Dr. Yoichi M. A. Yamada Dr. 《Angewandte Chemie (International ed. in English)》2009,48(15):2708-2710
You oughta use water : Broad functional‐group (FG) tolerance was observed for the title coupling of aryl halides (X=Cl, Br, I) and aryl boronic acids to give biaryl compounds with up to 94 % ee. The chiral imidazoindole phosphine–palladium catalyst supported on an amphiphilic polystyrene–poly(ethylene glycol) (PS–PEG) resin could be recycled readily.