- Pheromones of insects and their analogs. LII. Sythesis of dodec-9-en-1-yl and tetradec-11-en-1-yl acetates from the products of the partial ozonolysis of cycloocta-1z,5z-diene and cyclodeca-1e,5z-diene
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A new approach to the synthesis of octane-1,8-and decane-1,10-diols based on the partial ozonolysis of cyclic oligomers has been developed.
- Odinokov,Botsman,Gladysheva
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p. 381 - 383
(2007/10/03)
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- Synthesis of (S,E)-1-Methyl-9-dodecenyl Acetate, the Sex Pheromone of the Hessian Fly, Mayetiola destructor, by Lipase-catalyzed Enantioselective Hydrolysis
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(S,E)-1-Methyl-9-dodecenyl acetate , the sex pheromone of the hessian fly, Mayetiola destructor, was synthesized in a highly enantiomerically pure form by Pseudomonas cepacia lipase-catalyzed hydrolysis.
- Kamezawa, Makoto,Tachibana, Hojun,Ohtani, Takehiko,Naoshima, Yoshinobu
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p. 1962 - 1963
(2007/10/02)
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- Metamorphosis of Castor Oil to Insect Sex-pheromones and Useful Synthons
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The primary fragmentation products of Castor oil (1), namely, methyl undec-10-enoate (2) and sebacic acid (3) have been converted, using novel reactions and strategies into synthons of the type H-CC-(CH2)n-3-CH2OTHP (n=6=4; n=7=14; n=8=22; n=9=29).A surprisingly clean decarboxylative elimination of sebacic acid monoester gives methyl non-8-enoate (7), a synthon related to recefeiolide and a precursor to 4, the utility of which, has been illustrated with the synthesis of insect-pheromones of the species Grapholita molesta.Methyl dec-9-enoate (15) has been prepared by a novel and practical terminal ? to lower terminal ? degradation of 2.Compound 7 has been transformed via synthon 14 to the insect sex-pheromones of the species, Spodoptera frugiperda, Heliothis virescens and Paralobesia viteana in high yields and excellent stereochemical purity. 1-Tetrahydropyranyloxyundec-10-yne (22) readily prepared from 2, has been used to illustrate a new strategy in pheromone synthesis, namely, the use of coupling elements, leading to the preparation of bombykol in high yields and excellent stereochemical purity. 1-Tetrahydropyranyloxydodec-11-yne (29), already reported, has been transformed to vaccenic acid (30), the transposed ?-isomer of oleic acid, in good yields, thus demonstrating the use of acetylide synthons for the preparation of rare fatty acids also.
- Ranganathan, S.,Maniktala, Vibha,Kumar, Raaj,Singh, G. P.
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p. 1197 - 1207
(2007/10/02)
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