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Sulfonamide-pyridine-N-oxide cocrystals

机译:磺酰胺-吡啶-N-氧化物共晶体

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摘要

Hydrogen-bond motifs for the supramolecular synthesis of sulfonamide-pyridine-N-oxide complexes were derived from the analysis of cocrystal structures of aryl sulfonamides and pyridine-N-oxides. The sulfonamide NH donor persistently interacts with the N-oxide acceptor via a N-H ··· O hydrogen bond, though the exact geometry of the motif, such as discrete (D), infinite chain C(4), cyclic motifs R _4~2 (8) or R_2~2 (4), varies from structure to structure. Surprisingly, the two-point R_2~2 (8) cyclic motif of N-H···O and C- H···O hydrogen bonds, analogous to the heterosynthon in carboxamide-pyridine-N-oxide cocrystals, was not observed in sulfonamide-N-oxide cocrystals. The utility of this model study is demonstrated by making cocrystals of Furosemide with 4,4′-bipyridine-N,N′-dioxide and isonicotinamide-N-oxide.
机译:磺酰胺-吡啶-N-氧化物配合物的超分子合成的氢键基序来自芳基磺酰胺和吡啶-N-氧化物的共晶体结构分析。磺酰胺的NH供体通过NH···O氢键与N-氧化物受体持续相互作用,尽管基序的确切几何形状(例如离散的(D),无限链C(4),环状的基序R _4〜2) (8)或R_2〜2(4),随结构而异。令人惊讶地,在磺酰胺中未观察到类似于羧酰胺-吡啶-N-氧化物共晶体中的杂合子的NH··O和CHH··O氢键的两点R_2〜2(8)环状基序-N-氧化物共晶体。通过将呋塞米与4,4'-联吡啶-N,N'-二氧化物和异烟酰胺-N-氧化物共结晶来证明该模型研究的实用性。

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