[EN] PLANT GROWTH REGULATING COMPOUNDS<br/>[FR] COMPOSÉS RÉGULATEURS DE CROISSANCE DES PLANTES
申请人:SYNGENTA PARTICIPATIONS AG
公开号:WO2013037755A1
公开(公告)日:2013-03-21
The present invention relates to novel non-steroidal brassinosteroid mimetic derivatives, to processes and intermediates for preparing them, to plant growth regulator compositions comprising them and to methods of using them for controlling the growth of plants and/or promoting the germination of seeds.
Solution and solid-state studies on the molecular conformation of mono- and disubstituted pyridine amidoesters: the role of characteristic CH…O and NH…O interactions
作者:Ryszard Ostaszewski、Zofia Urbańczyk-Lipkowska
DOI:10.1016/s0022-2860(98)00581-x
日期:1999.1
conformation of 2PICR is stabilised by two intramolecularhydrogenbonds formed by the above-mentioned oxygens and pyridine H-atom in the system of two six-membered rings. According to FT-IR spectra taken in the solid state and in solution at different concentrations, four carbonyl groups of 2 are involved in a complicated pattern of inter- and intramolecularhydrogenbonds with some possibility of dimer formation
摘要 通过X射线衍射、FT-IR和NMR技术研究了模型酰胺酯2,6-吡啶二(基氨基琥珀酸甲酯) ( 2 )及其苦味酸盐2PICR H 2 O的分子构象。在固态下,已发现 2 及其 N 质子化形式有两种不同的构象。2 的构象通过两个涉及酰胺基氧和吡啶环质子的分子内氢键稳定,形成两个六元环(CH⋯O 距离为 2.3 和 2.4 A)。2PICR 的分子构象由两个六元环系统中由上述氧和吡啶 H 原子形成的两个分子内氢键稳定。根据固态和溶液中不同浓度的 FT-IR 光谱,四个羰基 2 参与复杂的分子间和分子内氢键模式,并有可能形成二聚体。2 和单取代化合物 4 的 1 H NMR 光谱以及 NOE 效应的测量使我们能够观察到吡啶 N 原子质子化时的构象变化。在固态下观察到的分子内相互作用模式在较低浓度的溶液中在很大程度上是守恒的。由于酰胺和酯 CO 基团参与分子内和分子间相互作用,改变分子构象、