Pheromone study on acarid mites. Part IX. Syntheses of alarm pheromone analogues of the mold mite, Tyrophagus putrescentiae, and their biological activities.
摘要:
针对霉菌螨(Tyrophagus putrescentiae),3, 7-二甲基-(Z)-2-辛烯酸甲酯(II)是除了天然信息素(奈尔酸甲酯 I)外,作为警报信息素最活跃的化合物,其活性与 I 相当(1-10ppm)。为了阐明诱导警报信息素活性的结构要求,制备了16个 I 的类似物,通过改造 II 的结构。为制备3-甲基和3-乙基-(Z)-2-烯酸甲酯,采用了乙氧基或甲氧基碳酰基甲烯三苯基膦与2-烷酮或3-烷酮的威蒂格反应。与2-烷酮的反应产生了约40%的(Z)-2-烯酸酯和约60%的(E)-2-烯酸酯,平均产率为60%。与3-烷酮的反应则得到了56%的(Z)-2-烯酸酯和44%的(E)-2-烯酸酯。在14种(Z)-2-烯酸甲酯化合物中展示了警报信息素活性。研究表明,分子中存在(Z)-烯丙基初级醇酸甲酯基团是诱导信息素活性的关键,且不需要非环状单萜碳骨架。
Novel aliphatic compounds, process for their preparation and their usage
申请人:——
公开号:US20040014816A1
公开(公告)日:2004-01-22
The present invention provides an aliphatic compound represented by the following formula (I) or pharmacologically acceptable salts thereof:
1
where n denotes an integer of 1 to 11, and 1 denotes an integer of 1 to 16,
the aliphatic compound being an optical isomer of the (2R,3S,2′S) configuration when the 8-position thereof is a double bond, or an optical isomer of the (2S,3R,2′RS) configuration when the 8-position is a single bond; methods for producing the compound or pharmacologically acceptable salts thereof; and uses of the compound in the treatment of cardiovascular diseases (e.g. arteriosclerosis, cardiac diseases), cancer, rheumatism, diabetic retinopathy, and respiratory diseases.
Pheromone study on acarid mites. Part IX. Syntheses of alarm pheromone analogues of the mold mite, Tyrophagus putrescentiae, and their biological activities.
作者:Yasumasa KUWAHARA、Lica SAKUMA
DOI:10.1271/bbb1961.46.1855
日期:——
Against the mold mite, Tyrophagus putrescentiae, 3, 7-dimethyl-(Z)-2-octenyl formate (II) is the most active compound as an alarm pheromone besides the natural pheromone, neryl formate (I), and this activity is equal to I (1-10ppm). In order to elucidate the structural requisites for inducing alarm pheromone activity, a total of 16 analogues of I were prepared by modifying the structure of II. For preparation of 3-methyl- and 3-ethyl-(Z)-2-alkenyl formates, the Wittig reaction of ethoxy- or methoxy-carbonylmethylene triphenyl phosphorane with 2-alkanone or 3-alkanone was used. The reaction with 2-alkanone gave a mixture of (Z)-2-alkenoate (ca. 40%) and (E)-2-alkenoate (ca. 60%) in an average 60% yield. The reaction with 3-alkanone gave a mixture of (Z)-2-alkenoate (56%) and (E)-2-alkenonate (44%). Alarm pheromone activities were demonstrated on 14 compounds of (Z)-2-alkenyl formates. The presence of the (Z)-allylic primary alcohol formate moiety in a molecule was clarified as the key to induce pheromone activity, and no necessity for an acyclic monoterpene carbon skeleton was demonstrated.
针对霉菌螨(Tyrophagus putrescentiae),3, 7-二甲基-(Z)-2-辛烯酸甲酯(II)是除了天然信息素(奈尔酸甲酯 I)外,作为警报信息素最活跃的化合物,其活性与 I 相当(1-10ppm)。为了阐明诱导警报信息素活性的结构要求,制备了16个 I 的类似物,通过改造 II 的结构。为制备3-甲基和3-乙基-(Z)-2-烯酸甲酯,采用了乙氧基或甲氧基碳酰基甲烯三苯基膦与2-烷酮或3-烷酮的威蒂格反应。与2-烷酮的反应产生了约40%的(Z)-2-烯酸酯和约60%的(E)-2-烯酸酯,平均产率为60%。与3-烷酮的反应则得到了56%的(Z)-2-烯酸酯和44%的(E)-2-烯酸酯。在14种(Z)-2-烯酸甲酯化合物中展示了警报信息素活性。研究表明,分子中存在(Z)-烯丙基初级醇酸甲酯基团是诱导信息素活性的关键,且不需要非环状单萜碳骨架。
Mild, Efficient, and Robust Method for Stereocomplementary Iron-Catalyzed Cross-Coupling Using (E)- and (Z)-Enol Tosylates
Iron-catalyzed cross-coupling of Grignard reagents (RMgX) with (E)- and (Z)-enol tosylates proceeded smoothly to give a variety of the corresponding (E)- and (Z)-trisubstituted α,β-unsaturated methyl esters (total 30 examples; 55-98% yield). The simple, mild, stereoretentive method utilized iron(III) chloride (FeCl3), iron(III) acetylacetonate [Fe(acac)3], and iron(III) tris(dibenzylmethane) [Fe(dbm)3]. The (E)- and (Z)-enol tosylates were readily prepared by the reported stereocomplementary tosylation method from methyl β-keto esters or α-formyl esters. Methyl α-formyl esters were obtained via a practical and robust TiCl4-Et3N-mediated α-formylation of methyl esters with methyl formate.