(2R)-4-[(9H-Fluoren-9-ylmeth-oxy)carbon-yl]-2-methyl-piperazin-1-ium chloride

Abstract

The synthesis of the title salt, C(20)H(23)N(2)O(2) (+)·Cl(-), was carried out with a precursor of known absolute configuration (R) and the X-ray analysis confirmed that the product retained the absolute configuration. In the crystal, the dominant packing motif is a chain running along [010] generated by N-H⋯Cl hydrogen bonding. C-H⋯O and C-H⋯Cl inter-actions are also observed.

Fig. 1.

Scheme I and II showing the two possible mono protected products, not possible to elucidate their structures by chromatographic or spectroscopic analysis.

Fig. 2.

View of the title compound showing the atom-labelling scheme. Displacement ellipsoids of non-H atoms are drawn at the 50% probability level. ORTEPII (Johnson, 1976).

Fig. 3.

Part of the molecular H-bond scheme with the molecules joined as chains containg equivalent symmetry translated units along the [1 0 0] direction. Dotted lines indicate H-bond interactions. The view is along the [1 0 0] direction. PLATON (Spek, 2009).

Fig. 4.

Spacefill packing diagram of the molecules in the unit cell along the [1 0 0] direction reflecting an efficient molecular packing arrangement. PLATON (Spek, 2009).