The fumarate salts of the N-isopropyl-N-methyl derivatives of DMT and psilocin

Abstract

The solid-state structures of the salts of two substituted tryptamines, namely N-isopropyl-N-methyltryptaminium (MiPT) fumarate {systematic name: [2-(1H-indol-3-yl)ethyl](methyl)propan-2-ylazanium 3-carboxyprop-2-enoate}, C14H21N2 +·C4H3O4-, and 4-hydroxy-N-isopropyl-N-methyltryptaminium (4-HO-MiPT) fumarate monohydrate {systematic name: [2-(4-hydroxy-1H-indol-3-yl)ethyl](methyl)propan-2-ylazanium 3-carboxyprop-2-enoate monohydrate}, C14H21N2O+·C4H3O4-·H2O, are reported. Both salts possess a protonated tryptammonium cation and a 3-carboxyacrylate (hydrogen fumarate) anion in the asymmetric unit; the 4-HO-MiPT structure also contains a water molecule of crystallization. Both cations feature disorder of the side chain over two orientations, in a 0.63014;(3):0.37014;(3) ratio for MiPT and a 0.77514;(5):0.22514;(5) ratio for 4-HO-MiPT. In both extended structures, N-H..O and O-H..O hydrogen bonds generate infinite two-dimensional networks.