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1
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Wiadomości Chemiczne
2001 [Z] 55, 7-8 657-691
EN The present short review describes methods of preparation and synthetic applications of alkoxyallenes. The title compounds can be obtain by variety of methods based on elimination, substitution, addition, isomerization and alkylation reactions. Methods based on elimination reactions and on substitut[...]
2
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Wiadomości Chemiczne
EN In the last few years there has been a growing interest in the use of microwave heating in organic synthesis. The use of such nonconventional reaction conditions reveals several features like: a short reaction time compared to conventional heating, ease of work-up after a reaction, and reduction in [...]
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88%
Polish Journal of Chemistry
1999 vol. 73 nr 7 1079-1089
EN Basic chemical properties of activated carbonyl compounds, such as carbonyl cyanide, dialkyl mesoxalates and alkyl glyoxylates are reviewed. Their. Their applications to important synthetic problems are also described. Special attention is given to glyoxylates of chiral alcohols and N-glyoxyloyl-(2R[...]
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75%
Przemysł Chemiczny
2002 T. 81, nr 2 106-110
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Wiadomości Chemiczne
2003 [Z] 57, 7-8 587-625
EN Progress in combinatorial chemistry is largely determined by development of specific synthetic organic chemistry tools such as solid supports, linkers, polymer supported reactions and methods of analysis, screening and deconvolution of combinatorial libraries. This review article presents basic term[...]
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Wiadomości Chemiczne
2003 [Z] 57, 5-6 435-457
EN The hetero-Diels-Alder (HDA) methodology employing a,b-unsaturated thiocarbonyl compounds represents a straightforward and efficient approach to sulfur-containing six-membered heterocycles. This review presents applications of a,b-unsaturated thiocarbonyl compounds in heterodiene reactions and cover[...]
7
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Przemysł Chemiczny
2015 T. 94, nr 12 2244-2246
PL 1,3-Dipolarne cykloaddycje nitroetenu do (Z)-C-fenylo-N-arylonitronów w chlorku 1-butylo-3-metyloimidazoliowym realizują się w temperaturze pokojowej i prowadzą do mieszanin stereoizomerycznych 3,4-cis i 3,4-trans-2-arylo-3-fenylo-4-nitrotetrahydro-1,2-oksazoli z wydajnościami na poziomie 80–85%. St[...]
EN 1,3-Dipolar cycloaddn. of CH2=CHNO2 to 3-Me, 4-Br, 3-Br and 4-NO2-substituted (Z)-C-phenyl-N-arylnitrones in 1-butyl-3-methylimidazolium chloride at room temperature gave mixts. of 3,4-cis and 3,4-trans-2-aryl-3-phenyl-4-nitrotetrahydro-1,2-oxazoles in yields 80–85%.[...]
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Przemysł Chemiczny
2013 T. 92, nr 2 158-164
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Przemysł Chemiczny
10
75%
Przemysł Chemiczny
2014 T. 93, nr 11 1937-1941
PL Alkohol allilowy, po opracowaniu i wdrożeniu w skali technicznej tanich metod jego otrzymywania, stał się atrakcyjnym surowcem dla przemysłowej syntezy organicznej. Przedstawiono obecnie stosowane metody produkcji tego związku i kierunki jego dalszych zastosowań, gdzie dominująca pod względem skali [...]
EN A review, with 91 refs., of methods for prodn. of CH₂=CHCH₂OH and its use for manufg. polyester resins, allyl phthalates, copolymers with styrene, oxyethylates and butanediol-1,4.
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Wiadomości Chemiczne
2005 [Z] 59, 7-8 583--611
EN In 2001 prof. K.B. Sharpless from Scripps Institute has announced a new idea for an easier and faster molecular discovery, named click chemistry. This concept bases on the following observations: -currently organic chemists invest too much effort in assembling the structure, although it is the fun[...]
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63%
Wiadomości Chemiczne
2008 [Z] 62, 9-10 779-826
EN An efficient formation of carbon-carbon bonds belongs to one of the most important transformations in synthetic chemistry. The reaction is predominantly catalyzed by the late transition metals [1, 2]. Traditional methods that have been employed, to accomplish this transformation include Stille and S[...]
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Wiadomości Chemiczne
1998 [Z] 52, 7-8 545-568
EN In nature the enzymatic reactions are conduced in aqueous media. However for the purpose of organic synthesis nonaqueous conditions such as organic solvents are more suitable regarding reagents stability and reaction equilibrium. Rapidly increasing number of enzyme-catalysed processes shows great po[...]
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Wiadomości Chemiczne
2012 [Z] 66, 1-2 93-118
EN Different methods for preparing nonracemic arylallylic alcohols are presented in this work. A key feature was an application the biocatalyst as a mean to obtain final products. These compounds play an important role in pharmaceutical industry, because they are substrates in the synthesis of various [...]
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Wiadomości Chemiczne
2006 [Z] 60, 3-4 191-255
EN Solid Phase Asymmetric Synthesis (SPOS) is a recently introduced term embracing all methods of asymmetric synthesis involving use of solid supported substrates and reagents. This review presents basic definitions of asymmetric synthesis and currently used concepts for enatioselective and diastereose[...]
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Wiadomości Chemiczne
2013 [Z] 67, 5-6 495--519
EN The tartaric acid and its salts have been present in chemistry for almost 350 years, since Pierre Seignette isolated Rochelle salt in 1675. Since that time tartaric acid and its derivatives have been often used in chemistry due to their accessibility, enantiopurity, relatively low cost and presence [...]
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LAB Laboratoria, Aparatura, Badania
18
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Wiadomości Chemiczne
EN Among diverse systems containing multiple bonds, cumulenes are recognized as the most reactive derivatives towards both nucleophilic and electrophilic agents, and for this reason, they are considered as important class of substrates for organic synthesis. Over the last three decades alkoxyallenes ha[...]
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63%
Przemysł Chemiczny
2014 T. 93, nr 6 934-937
PL Przedstawiono przegląd wybranych zastosowań promieniowania mikrofalowego w syntezie organicznej.
EN A review, with 51 refs., of chem. reactions carried out in microwave field.
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Wiadomości Chemiczne
EN Carbon dioxide is an abundant, cheap, almost nontoxic, thermodynamically stable, inert electrophile. Exploitation of CO 2 as a chemical feedstock, although will almost certainly not reduce its atmospheric concentration significantly, aims to generate high-value products and more-efficient process[...]
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