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Synthesis of Spirans by Cyclocondensation of 2-Phenacylbenzothiazole with Hydrazine and o-Hydroxybenzaldehydes.

✍ Scribed by A. V. Vypirailenko; I. B. Dzvinchuk; M. O. Lozinskii


Publisher
John Wiley and Sons
Year
2003
Weight
85 KB
Volume
34
Category
Article
ISSN
0931-7597

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## Abstract magnified image 2,3‐Dihydro‐1__H__‐pyrrole‐2,3‐diones **1a‐d** react with hydrazine hydrate **2** and __o__‐phenylenediamine **4** under different conditions to yield the pyrazole‐3‐carboxamide derivatives **3a‐d**, the pyrrol‐2‐ones **5a‐d** and the quinoxaline‐2‐one derivatives **6a‐