The exception to the rule that Δ 3 -pyrazolines are not stable unless both nitrogen atoms are substituted that has been recently published, Tetrahedron Lett.55, 2208, (2014), has been proved false.By means of GIAO/B3LYP/6-311++G(d,p) calculations, it has been shown that the product is a pyrazole formed by rearrangement.
No takes yet. Share an insight, caveat, or question.
Alkorta et al. (2015) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: