Use of hydrogen bonds to control molecular aggregation. Association of dipyridones joined by flexible spacers
摘要:
Flexible dipyridone 1, which incorporates an extensive, self-complementary pattern of hydrogen-bond donors and acceptors, exists largely as an antiparallel dimer at 0.0016 M in CHCl3 at 25-degrees-C. In the solid state, however, dipyridone 1 prefers a polymeric motif with an intramolecular hydrogen bond. We propose that the structure formed in solution is dimer 5 joined by four intermolecular hydrogen bonds or dimer 6 held together by two intermolecular hydrogen bonds strengthened by the cooperative effect of two intramolecular hydrogen bonds.
Development of novel 2-substituted acylaminoethylsulfonamide derivatives as fungicides against Botrytis cinerea
作者:Minlong Wang、Ying Du、Chunhui Liu、Xinling Yang、Peiwen Qin、Zhiqiu Qi、Mingshan Ji、Xinghai Li
DOI:10.1016/j.bioorg.2019.03.017
日期:2019.6
2-ethoxyacetylamide derivative (V-A-12, EC50 = 0.66 mg·L−1) exhibited the highest potency in vitro and superior fungicidal activity compared with procymidone (EC50 = 1.06 mg·L−1). In vivo bioassay indicated that compound V-A-12 could be effective for the control of tomato gray mold. Moreover, the structure-activityrelationship of these sulfonamides was analyzed by establishing a three-dimensional quantitative structure-activity