Mr. Suissa et al., A TETRASPIRO NONACYCLIC COMPOUND BY CONDENSATION OF 1,1-BIS(AMINOMETHYL)CYCLOHEXANE WITH FORMALDEHYDE, Chemical communications, (1), 1997, pp. 113-114
1,1-Bis(aminomethyl)cyclohexane condenses with formaldehyde to precipi
tate a polymer, which upon heating is readily isomerized to the nonacy
clic compound spiro[tetrakis(cyclohexane)-1,5'''':1',11'''':1'', ,15,1
9,21]octaazapentacyclo[19.3.1.1(3,7).1(9,13). 1(15,19)]octacosane 1, w
hose structure has been determined by X-ray analysis and C-13 NMR spec
troscopy.