Thiation of N‐(1‐tert‐butyl‐3‐methylpyrazol‐5‐yl)carboxamides 2 with the Lawesson reagent afforded the corresponding thiocarboxamides 3. Heating of 3 in formic acid gave the N‐dealkylated thiocarboxamides 4 which were cyclized into 4H‐pyrazolo[1,5‐c][1,3,5]thiadiazine‐4‐thiones 5 by treatment with thiophosgene. Copyright © 1994 Journal of Heterocyclic Chemistry
A New Procedure for the Synthesis of 4-H-Pyrazolo[1,5-c][1,3,5]thiadiazine-4-thiones
VICENTINI, Chiara Beatrice;VERONESE, Augusto;GUARNERI, Mario;MANFRINI, Maurizio;GIORI, Paolo
1994
Abstract
Thiation of N‐(1‐tert‐butyl‐3‐methylpyrazol‐5‐yl)carboxamides 2 with the Lawesson reagent afforded the corresponding thiocarboxamides 3. Heating of 3 in formic acid gave the N‐dealkylated thiocarboxamides 4 which were cyclized into 4H‐pyrazolo[1,5‐c][1,3,5]thiadiazine‐4‐thiones 5 by treatment with thiophosgene. Copyright © 1994 Journal of Heterocyclic ChemistryFile in questo prodotto:
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