共查询到20条相似文献,搜索用时 46 毫秒
1.
Dieter Himsl Dirk Wallacher Dr. Martin Hartmann Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(25):4639-4642
Lithium makes the difference : A simple strategy for the synthesis of lithium‐doped porous metal–organic frameworks (MOFs) is developed (see structure; C black, O red, AlO6 blue octahedra), thus paving the way for the facile preparation of lithium‐doped MOFs. Moreover, the significant increase in hydrogen adsorption predicted by theoretical calculations is observed.
2.
Guest Effect : The differences of nitrogen atom positions and the bridge bonds linked to two pyridine rings of some bipyridine guests can significantly affect the binding abilities and inclusion geometries of β‐cyclodextrin with the guests in both the solution and solid states.
3.
Thomas K. Wood Warren E. Piers Brian A. Keay Masood Parvez 《Angewandte Chemie (International ed. in English)》2009,48(22):4009-4012
2009: A boraanthracene odyssey : General routes to boraanthracene derivatives—long proposed, but never observed—are disclosed, along with the structural and photophysical properties of these compounds and their remarkable reactivity towards oxygen.
4.
5.
Serpil Boz Meike Stöhr Dr. Umut Soydaner Marcel Mayor Prof. 《Angewandte Chemie (International ed. in English)》2009,48(17):3179-3183
Like pearls on a string , molecular building blocks have been preorganized and then interlinked on a surface (see STM images). In this way both the supramolecular self‐assembly of the reactants as well as the subsequent thermal activation to release the protecting group are controlled.
6.
7.
8.
9.
José Luis García Ruano Prof. Dr. Vanesa Marcos Juan Antonio Suanzes Leyre Marzo José Alemán Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(27):6576-6580
Michael, Henry, and Henry : A new one‐pot reaction of α,β‐unsaturated aldehydes and β‐dicarbonyls, which involves a Michael reaction catalyzed by diarylprolinol ethers and an inter–intramolecular Henry tandem reaction catalyzed by TBAF (see scheme), has been developed. The reaction proceeds in high enantio‐ and diastereoselectivity for a wide range of unsaturated aldehydes and β‐dicarbonyl reagents.
10.
11.
Jianhui Zhu Yongmei Zhao Dr. Yanyan Zhu Ziyi Wu Miaoxin Lin Weijiang He Dr. Yan Wang Dr. Guangju Chen Prof. Dr. Lei Dong Dr. Junfeng Zhang Prof. Dr. Yi Lu Prof. Dr. Zijian Guo Prof. Dr. 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(21):5245-5253
The center of it all : An antitumor‐active trinuclear platinum complex forms unprecedented interstrand cross‐linked triadducts with 18‐mer DNA duplexes (see figure; complex in yellow with the platinum centers in red) and behaves differently from its dinuclear analogue.
12.
Zhengwei Mao Dr. Jinshan Guo Shuo Bai Tich‐Lam Nguyen Dr. Haibing Xia Dr. Yubin Huang Prof. Paul Mulvaney Prof. Dayang Wang Dr. 《Angewandte Chemie (International ed. in English)》2009,48(27):4953-4956
In the swim : Colloidal nanoparticles coated with polylactide (PLA, red) and poly(ethylene glycol) brushes (PEG, black) can transfer from organic to aqueous phases across liquid/liquid or liquid/gel interfaces during degradation of the PLA coating (see picture: first step), which is driven selectively by the hydrogen bonding of the PEG coating with the aqueous phase (second step).
13.
14.
Koji Fukamizu Yoshihiro Miyake Dr. Yoshiaki Nishibayashi Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(14):2534-2537
Another way to dienes : The ruthenium‐catalyzed 6‐endo‐cycloisomerization of 1,5‐enynes gives the corresponding 1,3‐cyclohexadienes in high to excellent yields. This novel synthetic and catalytic method constitutes another way to selectively prepare 1,3‐cyclohexadienes, this cyclic diene skeleton being a core subunit in many natural products and a useful building block for a variety of organic transformations.
15.
Chloé Vovard‐Le Bray Sylvie Dérien Pierre H. Dixneuf 《Angewandte Chemie (International ed. in English)》2009,48(8):1439-1442
Cross‐coupling carbenes : The coupling of a propargylic ester with a diazoalkane in the presence of [RuCl(cod)Cp*] catalyst leads to the formation of functionalized conjugated dienes with high stereoselectivity. The reaction involves the cross‐coupling of a vinylcarbene fragment, arising from a ruthenium‐catalyzed propargylic ester rearrangement, with a diazoalkane carbene.
16.
Yang Lan Minchao Zhang Wangqing Zhang Prof. Li Yang 《Chemistry (Weinheim an der Bergstrasse, Germany)》2009,15(15):3670-3673
A microreactor of hollow polymeric microspheres with Pd nanoparticles immobilized in its wall is designed for hydrogenation of olefins under organic/aqueous biphasic catalysis. The microreactor has an ability to encapsulate and concentrate olefins within the vacancy of the hollow microspheres in the aqueous phase, and therefore hydrogenation within the microreactors runs efficiently with concentrated reactants under organic/aqueous biphasic condition (see scheme).
17.
18.
Björn Kusebauch Benjamin Busch Kirstin Scherlach Dr. Martin Roth Dr. Christian Hertweck Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(27):5001-5004
A new “branch” for polyketide synthases was discovered in the biosynthesis of the antimitotic rhizoxin complex in the endofungal bacterium Burkholderia rhizoxinica. Genetic engineering and the structural elucidation of pathway intermediates revealed that a complex polyketide chain is branched at the β position by an unprecedented conjugate addition of an acetyl building block to an acryloyl precursor (see scheme).
19.