10<i>H</i>-Pyrazino[2,3-b][1,4]benzotellurazine, a Novel Tellurium-Containing Heterocyclic System

<div>Previously published syntheses of 10<i>H</i>-pyrazino[2,3-b][1,4]benzothiazines (X = S, R = H or Cl) and 10<i>H</i>-pyrazino[2,3-b][1,4]benzoselenazine (X = S, Se; <i>R</i> = H, Cl).</div>

Heteroatom Chemistry

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Figure 1

Figure 1: 10<i>H</i>-Pyrazino[2,3-b][1,4]benzotellurazine, a Novel Tellurium-Containing Heterocyclic System 

Heteroatom Chemistry

10H-Pyrazino[2,3-b][1,4]benzotellurazine, a Novel Tellurium-Containing Heterocyclic System

Figure 1