Boron-chelate assisted synthesis of dipyrazol-3(5)-ylmethane and 1,1 ',2,2 '-tetrapyrazol-3(5)-ylethane

摘要

A boron-chelate assisted methodology was applied to the synthesis of dipyrazol-3(5)-ylmethane and 1,1',2,2-tetrapyrazol-3(5)-ylethane from acetylacetone or tetraacetylethane, N,N'-dimethylformamide dimethyl acetal and hydrazine hydrate.