Synthesis and Antimicrobial Evaluation of Fire Ant Venom Alkaloid Based 2-Methyl-6-alkyl-Δ<sup>1,6</sup>-piperideines
作者:Yujie Yan、Yu An、Xiaozhong Wang、Yingqi Chen、Melissa R. Jacob、Babu L. Tekwani、Liyan Dai、Xing-Cong Li
DOI:10.1021/acs.jnatprod.7b00625
日期:2017.10.27
The first synthesis of 2-methyl-6-pentadecyl-Δ1,6-piperideine (1), a major alkaloid of the piperideine chemotype in fire ant venoms, and its analogues, 2-methyl-6-tetradecyl-Δ1,6-piperideine (2) and 2-methyl-6-hexadecyl-Δ1,6-piperideine (3), was achieved by a facile synthetic method starting with glutaric acid (4) and urea (5). Compound 1 showed in vitro antifungal activity against Cryptococcus neoformans
A new synthesis of the four stereoisomers of 3,11-dimethyl-2-nonacosanone, the female-produced sex pheromone of the german cockroach
作者:Kenji Mori、Hirosato Takikawa
DOI:10.1016/s0040-4020(01)85576-9
日期:1990.1
The pure four stereoisomers of 3,ll-dimethyl-2-nonacosanone (1), the female-produced sexpheromone of the Germancockroach, were synthesized starting from (R)-citronellol (2a) and ethyl (R)-3-hydroxybutanoate (3). The key step was the chromatographic separation of (5RS,6R)-6-hydroxy-5-methyl-2-heptanone (16a) to give pure (5R,6R- and) 5S,6R-isomers. All of the four stereoisomers of 1 were bioactive
A simple protocol for performing chromium-catalyzed highly diastereoselective alkylations of arylmagnesium halides with cyclohexyl iodides at ambient temperature has been developed. Furthermore, this ligand-free CrCl2 enables efficient electrophilic alkenylations of primary, secondary and tetiary alkylmagnesium halides with readily available alkenyl acetates. Moreover, this chemoselective C‒C coupling
作者:Richard A. Bartsch、Leah P. Bitalac、Charles L. Cowey、Sadik Elshani、Mi-Ja Goo、Vincent J. Huber、Sheryl N. Ivy、Youngchan Jang、Russell J. Johnson、Jong Seung Kim、Elzbieta Luboch、Joseph A. Mcdonough、Michael J. Pugia、Byungki Son、Qiang Zhao
DOI:10.1002/jhet.5570370554
日期:2000.9
Synthetic routes to forty-four dibenzocrown ether alcohols are reported. The new crown ether com pounds are based on a sym-dibenzo-16-crown-5 platform. Most have a hydroxy group and an alkyl, aryl, aralkyl, alkenyl, alkynyl, or perfluoroalkyl group on the central carbon of the three-carbon bridge. Others have substituted benzene rings and either a hydroxy or -O(CH2)nOH group attached to the central