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松毛虫性信息素(5Z,7E)-十二碳二烯醇的立体选择性合成 总被引:2,自引:0,他引:2
从简单原料乙炔出发,通过炔对丙烯醛的加成反应得到7-溴代-(4Z,6E)-庚二烯醛,再经乙二醇保护、Pd催化偶联、水解、Wittig反应和还原等步骤,立体选择性地得到松毛虫性信息素(5Z,7E)-十二碳二烯醇,其结构通过IR,NMR和MS等技术得到确认. 相似文献
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昆虫信息素的研究(Ⅴ)——家蝇性诱剂(Z)-9-二十三碳烯的合成 总被引:2,自引:0,他引:2
1971年Carlson等首先从雌性家蝇(Musca domestica)表皮类脂物和粪便类脂物中分离、鉴定并且合成了(Z)-9-二十三碳烯[1],命名为muscalure,这个化合物对雄蝇具有引诱作用,其后陆续报道了这个化合物的一些合成方法[2-6],其中美国Zoecon公司Carney等使用易得的油醇为原料,经甲基磺酰氯-三乙胺处理转变成甲基磺酸油酯,在铜盐催化下与正戊基镁溴化物偶联的方法提供了该产品商品化生产的路线[6]. 相似文献
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性信息素;甘薯象鼻虫信息素(E)-2-丁烯酸-(Z)-3-十二烯基酯的全合成 相似文献
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以异丙醇为溶剂(或无溶剂),采用三乙烯二胺(DABCO)催化的取代苯酚(或取代苄醇)与2-丁炔酸乙酯的Michael加成反应合成了14个(E)-β-芳氧基丙烯酸酯化合物(3a~3n,3f~3n为新化合物)和3个烷氧基丙烯酸酯化合物(5a,5b和5k,5b和5k为新化合物),收率分别为85%~99%和60%~68%,其结构经1H NMR,13C NMR和HR-MS(ESI)表征。以3a的合成为例,优化了合成3的反应条件。结果表明:在最优反应条件(DABCO为催化剂,异丙醇为溶剂,于25℃反应9 h)下,3a收率92%,E∶Z99∶1。 相似文献
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Introduction The isolation and structure of (3S, 6R)-3-methyl-6-isopropenyl-9-decen-1-yl acetate (1), one of the sex pheromones of the female California red scale, Aouidiella aurantii (Maskell), were reported by Roelofs. Because the California red scale is the main pest 相似文献
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Zhi Zhen HUANG* Hong Wei JIN De Hui DUAN Department of Chemistry Zhejiang University at Xixi Campus Hangzhou 《中国化学快报》2001,(6)
Benzotriazole has played an important role as a synthetic auxiliary for preparative chemists1. It is also well known that organic selenides or tellurides are versatile intermediates in organic synthesis2. However, there are only few reports on the synthesis of the difunctionalized compounds containing both benzotriazolyl group and organoselenium or tellurium group3. Herein we wish to report a new and convenient synthesis of benzotriazol-1-yl methyl selenides and tellurides 4a-h.Selenium or tel… 相似文献
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应用不同交联度的聚合物Wittig试剂合成亚洲玉米螟性信息素 总被引:2,自引:0,他引:2
我国广东省测试分析中心及美国的Klun几乎同时确定亚洲玉米螟性信息素的化学结构为(E)及(Z)-12-十四碳烯-1-醇乙酸酯(Z:E=1:1)。合成方法大多由合适的炔烃出发,先合成相应的炔键类似物,再转化成烯键,但原料较难获得,反应条件苛刻,路线长或产率 相似文献
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贵州玉米螟性信息素的简易合成及田间生物活性测定初探 总被引:1,自引:0,他引:1
报道了亚洲玉米螟(OstriniaFurnacalisGuenee)性信息的素顺-12-十四碳烯醇醋酸酯(A)及其反应异构体(B)的立体选择性合成,以及它的田间生活活性测定试验,合成的关键步骤是通过控制羧基烯化反应体系的反应温度,用相应的ω-羟基季磷盐(D)和醛一步生成所需比例的(A)(B)两个顺反式异构体混合物。 相似文献
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Dr. Pavel Jiroš Dr. Blanka Kalinová Dr. Anna Jirošová Dr. Jakub Straka Kateřina Černá Dr. Jan Šobotník Dr. Josef Cvačka Dr. Ullrich Jahn 《Chemistry (Weinheim an der Bergstrasse, Germany)》2013,19(26):8515-8524
The asymmetric total synthesis of the diastereomers of stylopsal establishes the absolute configuration of the first reported sex pheromone of the twisted‐wing parasite Stylops muelleri as (3R,5R,9R)‐trimethyldodecanal. The key steps for the diastereo‐ and enantiodivergent introduction of the methyl groups are two different types of asymmetric conjugate addition reactions of organocopper reagents to α,β‐unsaturated esters, whereas the dodecanal skeleton is assembled by Wittig reactions. The structure of the natural product was confirmed by chiral gas chromatography (GC) techniques, GC/MS and GC/electroantennography (EAD) as well as field tests. An investigation into the biosynthesis of the pheromone revealed that it is likely to be produced by decarboxylation of a 4,6,10‐trimethyltridecanoic acid derivative, which was found in substantial amounts in the fat body of the female, but not in the host bee Andrena vaga. This triple‐branched fatty acid precursor thus seems to be biosynthesized de novo through a polyketide pathway with two consecutive propionate‐propionate‐acetate assemblies to form the complete skeleton. The simplified, motionless and fully host‐dependent female exploits a remarkable strategy to maximize its reproductive success by employing a relatively complex and potent sex pheromone. 相似文献