88166-24-9Relevant academic research and scientific papers
Design, synthesis, and herbicidal activity of sec-p -menthane-7-amine derivatives as botanical herbicides
Chen, Yuxiang,Dong, Huanhuan,Jiang, Jianxin,Wang, Jing,Xu, Shichao,Zhang, Hongmei,Zhao, Zhendong
, p. 27207 - 27214 (2021/08/25)
In this study, a series of novel p-menthane type secondary amines (sec-p-menthane-7-amine derivatives 3a-3y) were synthesized and then characterized by FTIR, 1H NMR, 13C NMR, and HRMS. The post-emergence herbicidal activities of these amines against barnyard grass and rape were evaluated by the culture dish method. Most of the sec-p-menthane-7-amine derivatives showed excellent herbicidal activities equivalent to or even higher than either diuron or glyphosate. The alkyl-substituted derivatives were more active than the phenyl-substituted derivatives. The herbicidal activities of compounds 3p, 3r, 3u, and 3w against the root growth of barnyard grass were 404% higher, respectively, than those of glyphosate. The herbicidal activities of compounds 3q, 3v, 3w, and 3x against the root growth of rape were 561%, 494%, 491%, and 544% higher, respectively, than those of diuron, and 484%, 760%, 423%, and 665% higher respectively, than those of diuron against shoot growth of rape. In addition, compounds 3p, 3u, and 3v are almost harmless to rice, wheat, sorghum, maize, and peanuts at a concentration of 100 mg L-1. Most of the compounds are nontoxic to HUVEC-C and BALB/c 3T3 cells. It is indicated that the title compounds could be utilized as botanical herbicides for future weed control.
Experimental determination of the conformational free energies (A values) of fluorinated substituents in cyclohexane by dynamic 19F NMR spectroscopy. Part 2. Extension to fluoromethyl, difluoromethyl, pentafluoroethyl, trifluoromethylthio and trifluoromethoxy groups
Carcenac, Yvan,Tordeux, Marc,Wakselman, Claude,Diter, Patrick
, p. 447 - 457 (2007/10/03)
The synthesis of monosubstituted and 1,4-substituted cyclohexanes bearing one of the title groups is described. The conformational analysis of these compounds was studied by 19F NMR spectroscopy at various temperatures. Chemical shifts for each conformer above the coalescence temperature were obtained by binomial regression from low temperature values, allowing the high precision determination of the equilibrium constants, and the corresponding thermodynamic parameters (ΔG°, ΔH°, ΔS°) of the fluorinated substituents. For A values (-ΔG°298K), the following averaged data were obtained: 1.59 (CFH2), 1.85 (CF2H), 2.67 (C2F5), 0.79 (OCF3) and 1.18 (SCF3) [in kcal mol-1]. the Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2006.
Catalytic Reaction. 1. Catalytic 1,4-Hydrogenation of α,β-Unsaturated Aldehydes and Ketones using SC-1 Nickel Boride
Belisle, Christopher M.,Young, Yvette M.,Singaram, Bakthan
, p. 5594 - 5598 (2007/10/02)
Ex-situ generated Sc-1 nickelboride (SC-1 Ni2B), prepared by refluxing nickel chloride and sodium borohydride in methanol, is used in the selective 1,4-hydrogenation of α,β-unsaturated ketones and aldehydes at one atmospheric pressure.Previous studies of in-situ generated Ni2B have had the disadvantage of the undesirable side reaction of sodium borohydride with the various functional groups.In contrast, our catalyst cleanly gives the corresponding saturated aldehyde or ketone with no detectable amounts of saturated alcohol.Furthermore, the degree of substitution of the double bond plays a significant role in the rate of hydrogenation.While unsaturated carbonyl compounds containing di- and tri- substituted duoble bonds are readily hydrogenated, tetrasubstituted double bond containing carbonyl compounds are highly unreactive.
127. Conformationally Controlled Odor Perception in 'Steroid-type' Scent Molecules
Ohloff, Guenther,Giersch, Wolfgang,Thommen, Walter,Willhalm, Bruno
, p. 1343 - 1354 (2007/10/02)
A series of compounds possessing a 'steroid-type' scent and related to 4-(4'-t-butylcyclohexyl)-4-methyl-2-pentanones (1 and 2) have been synthesized.The odor of these compounds has been found to be dependent on their conformation; only when the molecule can assume a steroid-like shape there is an interaction with the odor chemoreceptor.
