Zobrazeno 1 - 10
of 243
pro vyhledávání: '"S. Grzejszczak"'
Autor:
Michał W. Wieczorek, Marian Mikołajczyk, Fernando Montanari, Wanda H. Midura, S. Grzejszczak, Mauro Cinquini, Janina Karolak-Wojciechowska
Publikováno v:
Tetrahedron. 50:8053-8072
Chlorination of α-phosphoryl sulfoxides 1 with iodobenzene dichloride and sulfuryl chloride in the presence and in the absence of pyridine and stereochemical investigations of this reaction using (+)-(S)-α-dimethoxyphosphorylmethyl p-tolyl sulfoxid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a18168910cbdf27cf0ccd8050b77a61
https://doi.org/10.1016/s0040-4020(01)85289-3
https://doi.org/10.1016/s0040-4020(01)85289-3
Autor:
S. Grzejszczak, Fernando Montanari, Mauro Cinquini, Marian Mikołajczyk, Wanda H. Midura, Janina Karolak-Wojciechowska, Michał W. Wieczorek
Publikováno v:
ChemInform. 25
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74d31b365778e2d718e7586bf6511edb
https://doi.org/10.1002/chin.199450178
https://doi.org/10.1002/chin.199450178
Publikováno v:
Tetrahedron. 35:1019-1025
Additive increments for para and meta substituents in the aromatic ring were calculated on the basis of 332 examples of chemical shifts and were correlated with Hammett's constants. Examples of calculation of chemical shifts of olefinic protons in su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::099f3914572fa714874f8e0aa3e98059
https://doi.org/10.1016/s0040-4020(01)93718-4
https://doi.org/10.1016/s0040-4020(01)93718-4
Publikováno v:
Phosphorus and Sulfur and the Related Elements. 10:369-373
A convenient method is described for the formation of distyryl sulphides, sulphoxides and sulphones. Thus, Horner-Wittig reaction in two-phase system of the corresponding phosphonates with aromatic aldehydes affords the desired α β unsaturated sulp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c5ca863f815d934a24e356e84108cca2
https://doi.org/10.1080/03086648108077389
https://doi.org/10.1080/03086648108077389
Publikováno v:
Tetrahedron Letters. 17:477-480
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dcca710a1a38f0541120d23582254544
https://doi.org/10.1016/s0040-4039(00)77887-7
https://doi.org/10.1016/s0040-4039(00)77887-7
Autor:
Burkhard Costisella, S. Grzejszczak, B. Mlotkowska, Hans Gross, Marian Mikołajczyk, Andrzej Zatorski
Publikováno v:
Tetrahedron. 34:3081-3088
A new and general synthesis of ketene S,S-thioacetals (1) and ketene O.S-thioacetals (6) which involves the Horner-Wittig reaction of carbonyl compounds with the metallated S,S- and O,S-thioacetals of formyl-phosphonates (4 and 5) is described. The H
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bdcf9a5382c494a4d08542749fee1eff
https://doi.org/10.1016/0040-4020(78)87003-3
https://doi.org/10.1016/0040-4020(78)87003-3
Publikováno v:
The Journal of Organic Chemistry. 43:2518-2521
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63d1f9df748cc9660f579c9ef8e1c3cb
https://doi.org/10.1021/jo00406a050
https://doi.org/10.1021/jo00406a050
Publikováno v:
Tetrahedron Letters. 23:2237-2240
An effective synthesis of 1,4-dicarbonyl systems involving the Horner—Wittig reaction of α-phosphoryl sulphides with the half-protected 1,3-dicarbonyl compounds followed by hydrolysis of the vinyl sulphides formed is described. The total synthesis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a525da9dc84815efb72254fa4eb5ab65
https://doi.org/10.1016/s0040-4039(00)87310-4
https://doi.org/10.1016/s0040-4039(00)87310-4
Publikováno v:
Tetrahedron Letters. 25:2489-2492
Oxidation of the α-alkylthio-substituted phosphonate carbanions was found to give the corresponding carbonyl compounds. A new synthesis of 1,4-dicarbonyl systems involving the oxygenation of phosphonate carbanions as a key step is described. Total s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c40490bfd1e0883ea20899e8c6a25844
https://doi.org/10.1016/s0040-4039(01)81212-0
https://doi.org/10.1016/s0040-4039(01)81212-0
Autor:
S. Grzejszczak, Burkhard Costisella, B. Mlotkowska, A. Zatorski, Hans Gross, Marian Mikołajczyk
Publikováno v:
Journal f�r Praktische Chemie. 319:17-22
Die Synthese von offenkettigen und cyclischen Alkyl- bzw. Aryl-S,S-acetalen von Formylphosphonsaureestern nach verschiedenen Methoden wird beschrieben. Die 1H-, 13C- und 31P-NMR-Spektren dieser Verbindungen werden diskutiert. α-Substituted Phosphona
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::708d378be375705cbf6047e2a3a4bae3
https://doi.org/10.1002/prac.19773190104
https://doi.org/10.1002/prac.19773190104