共查询到19条相似文献,搜索用时 75 毫秒
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α-蒎烯含氮衍生物的合成及其杀松材线虫活性的研究 总被引:2,自引:0,他引:2
<以α-蒎烯为原料, 经硼氢化-氧化、胺化及选择性还原等步骤合成了系列3-蒎酮亚胺和3-蒎胺类化合物, 探索了3-蒎酮亚胺和3-蒎胺的不同结构与杀松材线虫活性的关系. 采用FT-IR, 1H NMR, 13C NMR, GC-MS等分析手段对蒎酮亚胺和蒎胺类化合物的结构进行了表征. 结果表明: N-苯基-3-蒎酮亚胺具有很强的杀松材线虫活性, 在1×10-3 µL/mL (约1×10-3 mg/mL) 浓度下, 在24, 48和72 h内杀线虫效率分别达到89.28%, 89.58%和95.75%, 该化合物极具开发潜力. 相似文献
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负载型纳米TiO2/Al2O3复合载体负载SO4^2-催化剂的制备与催化性能研究 总被引:2,自引:2,他引:2
分别采用沉淀法,水解法和溶胶凝胶法制备了负载型纳米TiO2/Al2O3复合载体,同时在复合载体表面负载SO42-制成SO42-/TiO2/Al2O3固体酸催化剂,并将此催化剂用于α-蒎烯异构化反应中.用XRD、FTIR,TPD等手段对催化剂的晶相结构、比表面积、孔径分布、表面酸性等进行了表征.结果表明,三种方法所制备的催化剂均为纳米级且拥有着丰富而规则的孔结构,水解法制备的SO42-/TiO2/Al2O3催化剂中TiO2的平均粒径(10.0 nm)较小,比表面积(172.88 m2/g)较大,平均孔径为3.926 nm,表面酸中心数和酸强度均高于沉淀法和溶胶凝胶法制备的催化剂,在α-蒎烯催化异化反应中的具有较高的活性,α-蒎烯转化率为82.76%. 相似文献
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β-蒎烯氧化反应研究进展 总被引:2,自引:0,他引:2
综述了松节油中β-蒎烯的氧化反应的研究进展。目前研究的氧化方法有高锰酸钾氧化、环氧化、四醋酸铅氧化、臭氧氧化、光敏氧化和二氧化硒氧化等。通过各种氧化方法,β-蒎烯可用于合成诺蒎酸、诺蒎酮、2,l0-环氧蒎烷、水芹醛、紫苏醇、紫苏醛、紫苏葶、桃金娘烯醇等。 相似文献
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概述了国内外有关α-蒎烯的大气化学反应的研究进展.主要介绍了α-蒎烯与OH自由基、O3分子、NO3自由基的气相反应的机理及其产物以及形成二次有机气溶胶(SOA)的研究现状,还对α-蒎烯未来的研究动向等进行了阐述. 相似文献
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The effects of a number of factors on the efficiency of polymers containing immobilized pyrrolidinopyridine groups as polymeric activating reagents for the acylation of weakly reactive sterically hindered alcohols was studied. The conditions of the acylation of linalool with acetic anhydride in the presence of polymeric pyrrolidinopyridines were selected in such a way that the activity of polymeric systems under study was close to that of their low-molecular-weight analog, pyrrolidinopyridine (in a homogeneous medium).Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No 5, pp. 1287–1290, May, 1996. 相似文献
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P.Veeraraghavan Ramachandran Bodhuri PrabhudasDebarshi Pratihar J.Subash ChandraM.Venkat Ram Reddy 《Tetrahedron letters》2003,44(19):3745-3748
The synthesis of the C7C21 fragment of epothilone A involving asymmetric alkoxyallyl- and crotylboration using α-pinene-derived reagents is described. 相似文献
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《Tetrahedron: Asymmetry》1999,10(18):3547-3557
Each of the four enantiomerically pure tetrahydropyran linalool oxides was prepared by separate enantioselective Sharpless dihydroxylation of (R)- or (S)-linalyl acetate with AD-mix-α or AD-mix-β, followed by a completely stereoselective N-phenylselenophthalimide cyclization of an intermediate allylic alcohol. 相似文献
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Raffaele Saladino Veronica NeriAnna Rita Pelliccia Enrico Mincione 《Tetrahedron》2003,59(37):7403-7408
A convenient and efficient synthesis of monoterpene epoxides by application of heterogeneous poly(4-vinylpyridine)/methyl rhenium trioxide (PVP/MTO) and polystyrene/methyl rhenium trioxide (PS/MTO) systems is described. Even highly sensitive terpenic epoxides were obtained in excellent yield. Environment friendly, easily available, and low cost H2O2 was used as oxidant. Catalysts were stable systems for at least five recycling experiments. 相似文献
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Copolymerization of acyclic monoterpenoid, namely linalool (LIN), with styrene (STY) initiated by benzoyl peroxide (BPO) p‐acetyl benzylidene triphenyl arsonium ylide (p‐ABTAY) in xylene separately at 80°C for 180 min under inert atmosphere of nitrogen was performed. The results give a nearly alternating copolymer as evidenced from reactivity ratios (r1 = 0.016, r2 = 0.057) w.r.t. BPO; (r1 = 0.017, r2 = 0.052) w.r.t. p‐ABTAY (i.e. r1 = 0.0165 ± 0.0005 and r2 = 0.0545 ± 0.0025 per initiator set) using Kelen–Tudos method. The FT‐IR spectrum shows a band at 3026 cm?1 due to the aromatic ring of polystyrene and an alcoholic band of linalool at 3408 cm?1. 1H‐NMR spectrum shows peaks at δ 7.0–7.7 ppm of ? OH protons and peaks at δ 7.5–8.0 ppm due to phenyl protons of styrene. The system follows ideal kinetics i.e. Rp ∝ [LIN]1.0[STY]1.0[BPO]0.5/[p‐ABTAY]0.5. The overall energy of activation in the temperature range 75–85°C is 77.0 kJ mol?1 and 90.0 kJ mol?1, respectively. The values for Mark–Houwink constants for the functional copolymer has been evaluated as a = 0.40 and K = 1.60 × 10?4 with the help of gel permeation chromatography (GPC). Alfrey–Price, Q and e parameters for linalool have been evaluated as Q2 = 0.80; e2 = 1.25 w.r.t. BPO and Q2 = 0.90; e2 = 1.54 w.r.t. p‐ABTAY. Thermal properties of copolymers were investigated by thermogravimetric analysis (TGA) techniques. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
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A diastereoselective total synthesis of (±)-canadensolide is described. The key step is to introduce the α-methylene group by the ozonolysis of mono-substituted alkenes followed by reaction with a preheated mixture of CH2Br2-Et2NH. 相似文献
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ASHNAGAR Alamdar GHARIB NASERI Nahid FOROOZANFAR Shahla 《中国化学》2007,25(8):1171-1173
Teucrium polium is a dwarf sub-shrub usually 30-60 cm high with many branches, which is fairly distributed throughout Iran, with its flowering being season mainly from April to July. The plant was collected during its flowering season in Baghmalek region in the North-East of Khuzestan province, Iran. After the identification of the genus, species and variety of the plant, the dried whole plant (flowers, fruits and the leaves) was steam distilled with different methods. The isolated essential oil was dried over anhydrous sodium sulphate and stored at 4-6 ℃. Analysis of the essential oil was carried out by GC-MS technique. At least 10 major components were identified (3-carene/α-pinene, β-phellandrene, limonene, germacrene, β-bourbonene, β-caryophylene, γ-muurolene, γ-elemene, spathulenol, β-eudesmol) (totally 97.02%). Also, successive TLC and column chromatography of the essential oil resulted in the separation of four fractions. Based upon 1^H NMR, IR and mass spectra, the fractions with Rf=0.12 and 0.93 were determined as gualol and a mixture of α-pinene, β-phellandrene and limonene, respectively. 相似文献