11961
2007
2007
eng
article
1
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Regioselective synthesis of 1,3-thiazines by sequential 4-oxothiazolidine to 1,2-dithiole to 1,3-thiazine transformations : role of intramolecular non-bonded S...O interactions
A new synthetic approach to 2,3-dihydro-4H-1,3-thiazine derivatives based upon reductive rearrangement of 1,2- dithiole-3-ylidene thiones has been developed. In turn, the 1,2-dithiole derivatives were prepared by an efficient ring- opening-closing process of 2-alkylidene-4-oxothiazolidines, induced in the presence of Lawesson's reagent by intramolecular non-bonded 1,5-type S...O interactions in the 4-oxothiazolidine precursors.
http://www.sciencedirect.com/science/journal/00404020
10.1016/j.tet.2006.12.075
allegro:1991-2014
10103791
Tetrahedron. - 63 (2007), 9, S. 1937 - 1945
Aleksandar Rasovic
Peter J. Steel
Erich Kleinpeter
Rade Markovic
Institut für Chemie
Referiert
13513
2005
2005
eng
article
1
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Stereocontrolled synthesis of new tetrahydrofuro[2,3-d]thiazole derivatives via activated vinylogous iminium ions
Heterocyclization of (Z)-5-(2-hydroxyethyl)-3-methyl-4-oxothiazolidines, bearing electron-withdrawing groups conjugated to an exocyclic double bond at C(2)-position, afforded under reductive conditions, cis-tetrahydroftiro[2,3- d]thiazole derivatives. The reactions of these functionalized push-pull beta-enamines occur in a stereocontrolled fashion via activated vinylogous N-methyliminium ions, which are trapped by an internal hydroxyethyl group
0385-5414
allegro:1991-2014
10102914
Heterocycles. - ISSN 0385-5414. - 65 (2005), 11, S. 2635 - 2647
Rade Markovic
Marija Baranac-Stojanovic
Peter J. Steel
Erich Kleinpeter
Institut für Chemie
Referiert