Synthesis and Crystal Structure of a Small Bicyclic Tetraaza Proton Sponge, 1,4,7,10-Tetraazabicyclo[5.5.3]pentadecane Dibromide Perchlorate.

Cryptate Complexes with the Potential for CO2 Activation: Quantum Chemical Predictions and Synthetic Efforts

“…For IR spectroscopy, KBr or CsI discs of the compounds were prepared and measured by using an FTIR Biorad Merlin Excalibur FT 3000 spectrometer. C 12 2 and [(LH 2 )Li]ClO 4 ) by using graphite-monochromated Mo-K α radiation (λ = 0.71073 Å). CyclenTs 2 (1,7ditosyl-1,4,7,10-tetraazacyclododecane) and diethylene glycol di(ptoluenesulfonate) were synthesized according to previously published methods.…”

1,8-Bis(dimethylamino)naphthalene

“…The anion reacted with the radical cation to form a C-C bond. 35 The conformation of the tetraamine allowed all nitrogen lone pairs to point inside the molecule and thus complex with small metal ions. 31 The photoinduced electron transfer for the mixture of C 60 and 1,8-bis(dimethylamino)naphthalene in the presence and absence of a small amount of acid was examined.…”

Strategies for the Regioselective N-Functionalization of Tetraazacycloalkanes. From Cyclam and Cyclen Towards More Sophisticated Molecules

“…The tosyl group has been widely used, especially in the cyclen series since, as described in Section 3.1, trans ditosylcyclen can be selectively isolated in very good yield. 110,111 As previously discussed, the main drawback in use of the tosyl group is the harsh conditions needed to regenerate the secondary amine function. 36 New macrobicycles containing a cyclen unit have also been obtained from ditosylcyclen.…”