T. Okawara et al., PREPARATION AND STEREOCHEMISTRY OF 1,4,8,11-TETRAAZAPERHYDROPYRENE DERIVATIVES FROM N,N'-BIS(3-AMINOPROPYL)ETHYLENEDIAMINE, Heterocycles, 41(5), 1995, pp. 1023-1033
The reaction of N,N'-bis(3-aminopropyl) ethylenediamine (1) with glyox
al (2) in the presence of benzotriazole (3) afforded dibenzotriazoylte
traazaperhydropyrene (4), which was converted to polyazapolycycles (6)
, (13), (15), (16), and (19). The stereochemistry is discussed.