Crystallographic evidence of the formation of an N-alkylated enammonium salt: 5-ethoxycarbonylmethyl-1-ethyl-2,3,6,7-tetrahydro-4H,12H-indolo[2,3-a]quinolizin-5-ium trifluoromethanesulfonate
P. Bombicz et A. Kalman, Crystallographic evidence of the formation of an N-alkylated enammonium salt: 5-ethoxycarbonylmethyl-1-ethyl-2,3,6,7-tetrahydro-4H,12H-indolo[2,3-a]quinolizin-5-ium trifluoromethanesulfonate, ACT CRYST C, 55, 1999, pp. 454-455
The structure determination of the title compound, C21H27N2O2+. CF(3)rSO(3)
(-), substantiates the possibility of a reaction in which the alkylation pr
ocess of Wenkert enamines unexpectedly gives rise to an N-alkylated enammon
ium salt. The study of the molecular packing reveals that the small trifluo
romethanesulfonate anions are located between the sheets of the cations, th
us enjoying relatively high freedom of motion in their cavities.