13C NMR study of 1,3-pyridylmethyl ureas and -thioureas
作者:L.V. Sudha、D.N. Sathyanarayana
DOI:10.1016/0022-2860(85)87026-5
日期:1985.11
Abstract The 13 C NMR spectra of several 1,3-pyridylmethylureas and their corresponding thioureas have been obtained. The 13 C chemical shifts, and the direct and long range 13 C 1 H coupling constants have been deduced. The results indicate an E, Z molecular conformation for 1,3-pyridylmethylureas and thioureas which is stabilized by internal NH⋯N (pyridine) hydrogen bonding.
摘要 获得了几种1,3-吡啶基甲基脲及其相应硫脲的13 C NMR谱。推导了 13 C 化学位移,以及直接和长程 13 C 1 H 耦合常数。结果表明 1,3-吡啶基甲基脲和硫脲的 E、Z 分子构象通过内部 NH⋯N(吡啶)氢键稳定。
Infrared and 1H-NMR study of molecular conformation of some N,N′-arylalkylureas
作者:L.V. Sudha、D.N. Sathyanarayana
DOI:10.1016/0022-2860(84)85326-0
日期:1984.11
The 270 MHz $^1H$-NMR and IR spectra of several N,N'-arylalkylureas are analysed in terms of their conformational properties. For most systems, the -NHCONH- group adopts a less energetic trans—cis conformation which is stabilized by unsymmetric intramolecular hydrogen bonding of lower polarizability, in contrast to other N,N'-disubstituted ureas which are predominantly found in the trans—trans form
分析了几种 N,N'-芳基烷基脲的 270 MHz $^1H$-NMR 和 IR 光谱,分析了它们的构象特性。对于大多数系统,-NHCONH- 基团采用能量较低的反式-顺式构象,与主要在反式-反式中发现的其他 N,N'-二取代脲相比,该构象通过较低极化率的不对称分子内氢键稳定. 强调了 N 取代基对氢键和分子构象的影响。
OGURA, HARUO;MINEO, SATOSHI;NAKAGAWA, KUNIO, CHEM. AND PHARM. BULL., 1981, 29, N 6, 1518-1524
作者:OGURA, HARUO、MINEO, SATOSHI、NAKAGAWA, KUNIO
DOI:——
日期:——
[EN] HETEROCYCLIC COMPOUNDS AND USES THEREOF<br/>[FR] COMPOSÉS HÉTÉROCYCLIQUES ET LEURS UTILISATIONS
申请人:GIRAFPHARMA LLC
公开号:WO2019074979A1
公开(公告)日:2019-04-18
Heterocyclic compounds as Weel inhibitors are provided. The compounds may find therapeutic agents for the treatment of diseases and may find particular use in oncology.
Ocura, Haruo; Mineo, Satoshi; Nakagawa, Kunio, Chemical and pharmaceutical bulletin, 1981, vol. 29, # 6, p. 1518 - 1524