Isolation and Absolute Configuration Determination of Aliphatic Sulfates as the Daphnia Kairomones Inducing Morphological Defense of a Phytoplankton-Part 2
摘要:
4,8-二甲基壬基硫酸酯(1)和3-甲基-4E-癸烯基硫酸酯(2)是从水蚤Daphnia pulex中分离得到的两种信息素,能够诱导淡水浮游植物Scenedesmus gutwinskii var. heterospina(NIES-802)产生形态防御反应。根据Ohrui的方法对醇3的应用,确定了化合物1在C4位的绝对构型。通过分析醇11的(R)-1NMA酯的1H-NMR,确定了化合物2在C3位的绝对立体化学。
A stereoselective synthesis of the insect growth regulator (S)-(+)-hydroprene has been developed in seven steps with 50% overall yield starting from an easily available bromoester. Through using the Suzuki-Miyaura cross-coupling as the key C-sp2-C-sp2 bond forming step, high level of stereocontrol of the C2-C3 olefin is achieved. (C) 2012 Elsevier Ltd. All rights reserved.
Isolation and Absolute Configuration Determination of Aliphatic Sulfates as the Daphnia Kairomones Inducing Morphological Defense of a Phytoplankton-Part 2
4,8-Dimethylnonyl sulfate (1) and 3-methyl-4E-decenyl sulfate (2) were isolated from Daphnia pulex as the Daphnia kairomones that induced morphological defense of a freshwater phytoplankton Scenedesmus gutwinskii var. heterospina (NIES-802). The absolute configuration at C4 of 1 was determined by Ohrui's method applied to alcohol 3. The absolute stereochemistry at C3 of 2 was determined by 1H-NMR analysis of the (R)-1NMA ester of alcohol 11.
4,8-二甲基壬基硫酸酯(1)和3-甲基-4E-癸烯基硫酸酯(2)是从水蚤Daphnia pulex中分离得到的两种信息素,能够诱导淡水浮游植物Scenedesmus gutwinskii var. heterospina(NIES-802)产生形态防御反应。根据Ohrui的方法对醇3的应用,确定了化合物1在C4位的绝对构型。通过分析醇11的(R)-1NMA酯的1H-NMR,确定了化合物2在C3位的绝对立体化学。
Suzuki, Takahisa; Ozaki, Jotaro; Sugawara, Ryozo, Agricultural and Biological Chemistry, 1983, vol. 47, # 4, p. 869 - 876