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The title compound, C39H37NO8, is a product of the Michael addition of the cyclic secondary amine subunit of aza-14-crown-4 ether to dimethyl acetyl­enedicarboxyl­ate. The piperidinone ring exhibits a distorted chair conformation and the dimethyl acetyl­enedicarboxyl­ate fragment has a cis configuration with a dihedral angle of 56.61 (5)° between the two carboxyl­ate groups. The crystal packing is stabilized by the weak C—H...O hydrogen bonds.

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The title compound, C29H33NO8, is a product of the Michael addition of the cyclic secondary amine subunit of the aza-14-crown-4 ether to dimethyl acetyl­enedicarboxyl­ate. The piperidinone ring exhibits a distorted chair conformation, and the dimethyl ethylenedicarboxylate fragment has a cis configuration with a dihedral angle of 78.96 (5)° between the two carboxyl­ate groups. The crystal packing is stabilized by weak C—H...O hydrogen bonds.

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The title compound, C25H28N2O5, is a product of the Petrenko–Kritchenko condensation of N-acetyl­piperidone with 1,5-bis­(2-formyl­phen­oxy)-3-oxapentane and ammonium acetate. The mol­ecule comprises a fused penta­cyclic system containing an aza-14-crown-3-ether macrocycle, two piperidone and two benzene rings. The aza-14-crown-3-ether ring adopts a bowl conformation. The dihedral angle between the benzene rings fused to the aza-14-crown-4-ether unit is 70.18 (4)°. The central piperidone ring has a boat conformation, whereas the terminal piperidone ring adopts a chair conformation. The conformation of the central piperidone ring is determined by two intra­molecular N—H...O hydrogen bonds. In the crystal, mol­ecules are linked by weak C—H...O inter­actions into chains along [010].

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The title compound, C31H34N2O9, is a product of the Michael addition of the cyclic secondary amine subunit of the (bis­pidino)aza-14-crown-4 ether to dimethyl acetyl­ene­dicarboxyl­ate. The mol­ecule comprises a tricyclic system containing the aza-14-crown-3 ether macrocycle and two six-membered piperidinone rings. The aza-14-crown-3-ether ring adopts a bowl conformation with a dihedral angle between the planes of the fused benzene rings of 51.14 (5)°. The central piperidone ring has a boat conformation, whereas the terminal piperidone ring adopts a chair conformation. The dimethyl ethyl­enedicarboxyl­ate fragment has a cis configuration with a dihedral angle of 56.56 (7)° between the two carboxyl­ate groups. The crystal packing is stabilized by weak C—H...O hydrogen bonds.

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The title compound crystallizes as a chloro­form solvate, C20H23N3O3S·CHCl3, with two crystallographically independent units. The independent units have distinctly different inter­action patterns between the aza­crown macrocycle and the chloro­form solvent mol­ecule. In one of them, the chloro­form mol­ecule forms C—H...N and Cl...H—C hydrogen bonds with the aza­crown macrocycle (as a proton donor and an acceptor, respectively), whereas in the other, one of the chloro­form mol­ecules is bound to the aza­crown macrocycle by an attractive Cl...O [3.080 (3) Å] inter­action. The aza­crown macrocycles of different units are structurally similar; the aza-14-crown-3-ether ring adopts a bowl conformation with dihedral angles between the planes of the fused benzene rings of 60.7 (1) and 68.0 (1)°. The triazinane­thione ring in both cases has a sofa conformation. The crystal packing is characterized by N—H...S, N—H...O, C—H...Cl and C—H...S hydrogen bonds.
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