Wang B, Mi M, Li SJ, Huang JF, Feng P, Lin L, Tang Y. The Studies on the Synthesizing Dibenzodiazocinediimine via Constructing an Eight-Membered Ring.
J Org Chem 2025;
90:6655-6661. [PMID:
40344598 DOI:
10.1021/acs.joc.4c02912]
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Abstract
A one-step and facile strategy to synthesize dibenzo[b,f][1,5]diazocine-6,12(5H,11H)-diimine and its analogs via the construction of an eight-membered ring has been established using o-aminobenzonitrile or o-phenylenediamine/phthalonitrile derivatives as raw materials. Twelve compounds, including 9 new compounds, have been synthesized in yields ranging from 62-95%. Five new compounds of 5,12-dihydrodibenzo[b,f][1,4]diazocine-6,11-diimine derivatives have also been synthesized in yields of 35-52%. Furthermore, the reaction between arylnitriles and various amines was also efficiently established under similar reaction conditions. Finally, a reasonable mechanism involving sodium as a proper base to initiate the cyclization process was proposed.
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