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Ein 1,5-Diazabicyclo[3.3.0]octa-2,7-dien aus Acetylendicarbonsäure-dimethylester und einem 3,5-Dihydro-4H-1,2,3-triazol-4-on

✍ Scribed by Quast, Helmut ;Meichsner, Georg ;Regnat, Dieter ;Banert, Klaus ;Peters, Eva-Maria ;Peters, Karl ;von Schnering, Hans Georg

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
311 KB
Volume
1990
Category
Article
ISSN
0947-3440

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✦ Synopsis

A 1,5‐Diazabicyclo[3.3.0]octa‐2,7‐diene is Formed from Dimethyl Acetylenedicarboxylate and a 3,5‐Dihydro‐4__H__‐1,2,3‐triazol‐4‐one

The 3,5,5‐trialkyl‐3,5‐dihydro‐4__H__‐1,2,3‐triazol‐4‐one 1 and dimethyl acetylenedicarboxylate (2) react slowly at 50°C in a 1 : 1 ratio to afford a 40% yield of a deep red crystalline product C~18~H~24~N~2~O~8~. ^1^H‐, ^13^C‐ and ^15^N‐NMR spectra and an X‐ray diffraction analysis prove the structure 6 for the red product.

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