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1,3,4-Oxathiazolium

Zur Herstellung von 1,3,4-Oxathiazolium-Salzen werden aus S-(4-Methoxy-benzoyl)-thiohydr-oxylamin mit Acylchloriden erhaltene S,N-Diacyl-thiohydroxylamine (73-96%) durch Einwir-kung von Acetanhydrid/Perchlorsaure zu den Perchloraten (19-30%) cyclisiert18 ... [Pg.395]

Triazolium, Oxadiazolium, Thiadiazolium, Dioxazolium, Oxathiazolium, Dithiazolium ... [Pg.3]

Table 4 Proton and carbon-13 NMR data for dithiazolium (32) and oxathiazolium salts (33) and (34). [Pg.499]

All 1,4-(oxa/thia)-2-azolium salts are, in general, electrophilic species. Some of them, especially those where the positive charge is expected to locate predominantly inside the heterocyclic ring, are extremely electrophilic. Both kinds of oxathiazolium salts (6) and (7) exhibit this high electrophilic character, being attacked by solvents more nucleophilic than trifluoroacetic acid and nitromethane... [Pg.510]

Table 8 Best synthetic methods for dithiazolium (5) and oxathiazolium salts (6) and (7). Table 8 Best synthetic methods for dithiazolium (5) and oxathiazolium salts (6) and (7).
Phenyl oxathiazolium-olate (35) and the phosphaalkyne Bu C=P react to yield two isomeric 1,2,4-thiazaphospholes. Besides the main product (36) with the expected order of substituents, 3% of the product (37) with the reversed order is found <87CB1809,88AG1541). [Pg.786]

Die rontgendiffraklometrische Analyse 1 von 4-Phenyl-1,3,2-oxaihiazolium-5-ulat ergibt Bindungslangen, die den Grenzformeln III und IV am nachsten sind. Das Dipolmoment von 4-Phenyl-1,3,2-oxathiazolium-5-olat wurde zu 4,5 D bestimmt1. [Pg.392]

Oxathiazolium-5-olaten ist cardiovasculare Aktivitat zugeschrieben worden13... [Pg.392]

Die mesoionischen 1,3,2-Oxathiazolium-5-olate reagieren mit durch elektronenziehende Grup-pen aktivierten Alkinen in einer thermischen [3 + 2]-Cycloaddition unter Bildung von 1,2-Thiazolen4-6-9-10 auch die Reaktion mit aktivierten Alkenen4 6 fiihrt iiber einen Dehydrie-rungsschritt zu 1,2-Thiazolen (vgl. Bd. E8a, S. 722)3. [Pg.393]

In ahnlicher Weise iibertragt 4-Phenyl-l,3,2-oxathiazolium-5-olat das C,N,S-Strukturelement auch auf ein stabiles Alkylidin-phosphan15 und auf Benzo-cyclopropen1. ... [Pg.393]

Thiolat-Anionen greifen 1,3,2-Oxathiazolium-Salze entsprechend Grenzformel III (S. 393) an C-4 an und ergeben neben Disulfanen (80%) wenig stabile (Amino-sulfenyl)-organothio-... [Pg.394]

Von den sechs moglichen heteroaromatischen Oxathiazoliura-Salzen sind nur die 1,3,4-Oxa-thiazolium-I1 und die 1,4,2-Oxathiazolium-DerivateII2 bekannt. [Pg.394]

See other pages where 1,3,4-Oxathiazolium is mentioned: [Pg.492]    [Pg.527]    [Pg.395]    [Pg.395]    [Pg.395]    [Pg.106]    [Pg.492]    [Pg.498]    [Pg.498]    [Pg.526]    [Pg.527]    [Pg.37]    [Pg.681]    [Pg.745]    [Pg.745]    [Pg.392]    [Pg.392]    [Pg.392]    [Pg.392]    [Pg.393]    [Pg.393]    [Pg.394]    [Pg.394]    [Pg.395]    [Pg.395]    [Pg.395]    [Pg.395]    [Pg.396]    [Pg.396]    [Pg.396]    [Pg.396]    [Pg.821]   
See also in sourсe #XX -- [ Pg.394 ]



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From Meso-ionic l,3,2-Oxathiazolium-5-olates

L,3,2-Oxathiazolium-5-olat

Oxathiazolium olate

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