A Quantitative Structure−Activity Relationship Study of Herbicidal Analogues of α-Hydroxy-Substituted 3-Benzylidenepyrrolidene-2,4-diones
摘要:
A series of pyrrolidine-2,4-dione and piperidine-2,4-dione derivatives were prepared and evaluated for their herbicidal activities where some of these compounds exhibited good bioactivity against Echinochloa crus-galli in comparison with sulcotrione. Quantitative structure- activity relationship studies were performed on these compounds using physicochemical parameters ( hydrophobic, electronic, and Taft) as independent parameters and herbicidal activity as a dependent parameter, where herbicidal activity correlated best (r > 0.8) with hydrophobic (pi degrees + pi(p)), steric (Es), STERIMOL (B4), indicator (H-M), van der Waals volume (V), and electronic parameter (sigma(m) + sigma(p)) in this set of molecules; the optimum van der Waals volume for R-2 is about 41.8 A(3); when B4 is equal to 3, the target molecule possessed the lowest herbicidal activity.
Reductive Amination of Aldehydes and Ketones with Sodium Triacetoxyborohydride. Studies on Direct and Indirect Reductive Amination Procedures<sup>1</sup>
作者:Ahmed F. Abdel-Magid、Kenneth G. Carson、Bruce D. Harris、Cynthia A. Maryanoff、Rekha D. Shah
DOI:10.1021/jo960057x
日期:1996.1.1
triacetoxyborohydride is presented as a general reducing agent for the reductiveamination of aldehydes and ketones. Procedures for using this mild and selective reagent have been developed for a wide variety of substrates. The scope of the reaction includes aliphatic acyclic and cyclic ketones, aliphatic and aromatic aldehydes, and primary and secondary amines including a variety of weakly basic and
Synthesis and Herbicidal Activities of Novel 3-(α-Hydroxymethylene) pyrrolidine-2,4-dione Derivatives Containing a Cyclopropane Moiety
作者:You-quan Zhu、Jin Zhang、Yan-wei Yuan、Li-fen Xie、Hai-zhen Xu、Xiao-mao Zou、Hua-zheng Yang
DOI:10.1002/jhet.909
日期:2013.3
A variety of novel 3‐(α‐hydroxymethylene)pyrrolidine‐2,4‐dione derivativescontaining a cyclopropane moiety were designed and synthesized in satisfactory yields. Their structures were confirmed by 1H NMR and HRMS. The bioassays indicated that most of the title compounds displayed some extent herbicidalactivities at 100 mg/mL.
设计并合成了多种新型的含有环丙烷部分的3-(α-羟基亚甲基)吡咯烷-2,4-二酮衍生物,并以令人满意的产率合成了这些衍生物。它们的结构通过1 H NMR和HRMS确认。生物测定表明,大多数标题化合物在100 mg / mL时均显示出一定程度的除草活性。
Structure-Activity Study on<i>N</i>-Substituted-aminoacetonitriles Possessing Preventive Activity against Fusarium Diseases
The structure-activity relationships of N-alkylaminoacetonitriles and analogs possessing preventive activity against Fusarium diseases were investigated by the Hansch method. The variation in the preventive activity against yellows of the Japanese radish caused by Fusarium oxysporum f. sp. raphani was shown to be related to the variation in the steric dimension of the N-alkyl group. The amide, carboxylic acid and alcohol derivatives of N-sec-butylaminoacetonitrile were inactive while those of N-allylaminoacetonitrile showed the potent activity.