Reinvestigation of the condensation of 2‐hydrazinobenzothiazole with ethyl acetoacetate | Zendy

Peet Norton P. | Zendy; Sunder Shyam | Zendy; Barbuch Robert J. | Zendy; Whalon Michael R. | Zendy; Huffman John C. | Zendy

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Reinvestigation of the condensation of 2‐hydrazinobenzothiazole with ethyl acetoacetate

Author(s) -

Peet Norton P.,

Sunder Shyam,

Barbuch Robert J.,

Whalon Michael R.,

Huffman John C.

Publication year - 1988

Publication title -

journal of heterocyclic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.321

H-Index - 59

eISSN - 1943-5193

pISSN - 0022-152X

DOI - 10.1002/jhet.5570250235

Subject(s) - chemistry , ethyl acetoacetate , yield (engineering) , condensation , medicinal chemistry , product (mathematics) , organic chemistry , catalysis , materials science , physics , metallurgy , thermodynamics , geometry , mathematics

The reaction of 2‐hydrazinobenzothiazole (1) with ethyl acetoacetate has twice been reported to yield a fused triazepinobenzothiazolone, namely, 3‐methyl[1,2,4]triazepino[3,4‐ b ]benzothiazol‐5(4 H )‐one (4). We have repeated this work and reassigned the reaction product as 2‐(2‐benzothiazolyl)‐1,2‐dihydro‐5‐methyl‐3 H ‐pyrazol‐3‐one (5) on the basis of X‐ray crystallography.

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