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5-(1-Alkenyl)-1, 3, 4-oxadiazol-2(3H)-one

✍ Scribed by Kurt Rüfenacht

Publisher: John Wiley and Sons
Year: 1974
Tongue: German
Weight: 126 KB
Volume: 57
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19740570223

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✦ Synopsis

Abstract

3‐(2‐alkenoyl)‐thiocarbazic acid O‐methyl esters 1 are desulfurated by bromine and the unknown intermediates are transformed by alkali to 5‐(1‐alkenyl)‐1, 3, 4‐oxadiazol‐2(3__H__)‐ones (2). This type of oxadiazolone substitution is not realizable by the common ring closure of hydrazides with phosgene due to pyrazolidinone ring closure of unsaturated acids with hydrazine.

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