Preparation and Some Reactions of 1 H ‐1,4‐Benzothiazine Ylides (= 1 H ‐1,4‐Benzothioniaazin‐4‐ide) | Zendy

Iskander George M. | Zendy; Khawad Ibrahim E. | Zendy; Yousif Ghariballa | Zendy; Fisher Keith | Zendy; Fair C. Kay | Zendy; Schlemper Elmer O. | Zendy

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Preparation and Some Reactions of 1 H ‐1,4‐Benzothiazine Ylides (= 1 H ‐1,4‐Benzothioniaazin‐4‐ide)

Author(s) -

Iskander George M.,

Khawad Ibrahim E.,

Yousif Ghariballa,

Fisher Keith,

Fair C. Kay,

Schlemper Elmer O.

Publication year - 1985

Publication title -

helvetica chimica acta

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.74

H-Index - 82

eISSN - 1522-2675

pISSN - 0018-019X

DOI - 10.1002/hlca.19850680816

Subject(s) - chemistry , benzothiazine , alkylation , hydrazine (antidepressant) , hydrate , medicinal chemistry , thermal decomposition , olefin fiber , redox , decomposition , organic chemistry , catalysis , chromatography

A series of fifteen 1 H ‐1,4‐benzothiazine ylides were obtained by alkylation of the corresponding 4 H ‐1,4‐benzothiazines 1 . Ylides of type 2g–r showed slight [1,2] rearrangements upon thermolysis besides main dealkylation to 1 and olefin production. The ylides of this type underwent redox reactions when treated with hydrazine hydrate alone, giving 3,4‐dihydro‐2 H ‐1,4‐benzothiazines mainly, while ylides of type 2a–f failed to react.

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