3025-30-7Relevant articles and documents
Stereoselective synthesis of pear ester
Shakhmaev,Sunagatullina, A. Sh,Akimova,Zorin
, p. 1017 - 1019 (2017)
A simple two-step synthesis of ethyl-(2E,4Z)-deca-2,4-dienoate based on Fe-catalyzed cross-coupling of ethyl-(2E,4Z)-5-chloropenta-2,4-dienoate, which was obtained via one-pot oxidation and olefination of readily available (2Z)-3-chloroprop-2-en-1-ol by n-pentylmagnesiumbromide, was developed.
Preparation method of (E, Z)-2, 4-ethyl decadienoate
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Paragraph 0046; 0047, (2019/05/15)
The invention provides a preparation method of (E, Z)-2, 4-ethyl decadienoate. According to the preparation method, n-hexyl aldehyde is taken as an initial raw material, and three step chemical conversion is adopted to prepare a key intermediate 1-bromo heptene; 1-bromo heptene and ethyl acrylate are subjected to coupling reaction under the catalytic effect of a metal catalyst so as to obtain (E,Z)-2, 4-ethyl decadienoate. According to the preparation method, metal catalytic coupling reaction is adopted to replace a step in the prior art that (E, Z)-2, 4-ethyl decadienoate is prepared throughpreparation of an organic copper lithium reagent, water-free oxygen-free harsh conditions are avoided, operation is simplified, reaction efficiency is increased, generation of waste water and waste salt is reduced greatly, equipment investment is reduced, and the preparation method is convenient for industrialization production.
Bisexual attractants, aggregants and arrestants for adults and larvae of codling moth and other species of lepidoptera
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, (2008/06/13)
Novel bisexual attractants for lepidopterous insect pests isolated from pears or apples. A method for monitoring and control of codling moth and other species of Lepidoptera comprising a lure and kill, mating disruption or mass trapping strategy. A method of using a formulation containing the bisexual attractants with or without an insecticide and/or pheromone for control of the insect pests.
Stereoselective synthesis of methyl and ethyl (2E,4Z)-2,4-decadienoates from (E)-4,4-dimethoxy-2-butenal
Ovanesyan,Garibyan,Badanyan
, p. 951 - 954 (2007/10/03)
Methyl and ethyl (2E,4Z)-2,4-decadienoates were synthesized starting from (E)-4,4-dimethoxy-2-butenal.
Highly cis-selective Wittig reactions employing α-heterosubstituted ylids
Zhang, Xin-Ping,Schlosser, Manfred
, p. 1925 - 1928 (2007/10/02)
1-Alkenyl chlorides, bromides or iodides can be obtained with very high cis selectivities through Wittig reaction employing α-chloro, α-bromo α-iodo ylids derive from tris(2-methoxymethoxyphenyl)phospine. The corresponding α-methoxy substituted ylid produces enethers with again remarkably high cis/trans ratios. Palladium(II) catalyzed coupling of (Z)-1-iodo-1-heptene with ethyl acrylate affords ethyl (2E,4Z)-2-4-decadienoate, the Bartlett pear fragrance, with almost quantitative yield.
A Stereoselective Synthesis of Ethyl (2E,4Z)-2,4-Decadienoate: Pear Ester
Sharma, G.V.M.,Rajagopal, D.
, p. 633 - 636 (2007/10/02)
A stereoselective synthesis of ethyl (2E,4Z)-2,4-decadienoate (1) is reported from E-pent-2-en-4-yn-1-ol in five steps.
A STEREOSELECTIVE SYNTHESIS OF PEAR ESTER VIA ARSENIC YLIDE
Zhengming, Li,Tiansheng, Wang,Diankun, Zhang,Zhengheng, Gao
, p. 91 - 96 (2007/10/02)
The paper describes a four-step synthesis of ethyl (2E,4Z)-2,4-decadienoate (pear ester) from propargyl alcohol with a 50percent total yield.It also gives the synthesis of ethyl (2E,4E)-2,4-decadienoate.In both cases arsenic ylides were used to give the satisfactory results.
SYNTHESE STEREOSELECTIVE DU DECADIENE-2(E), 4(Z)OATE D'ETHYLE. A PARTIR D'UN MONOACETAL DU GLYOXAL
Stambouli, A.,Amouroux, R.,Chastrette, M.
, p. 5301 - 5302 (2007/10/02)
The glyoxal monoacetal 2, now readily available in bulk quantity, is a very useful synthon for the dienes-1,3 synthesis, as illustrated in the stereoselective preparation of ethyl 2E,4Z-decadienoate using two Wittig-type olefination reactions.
