18836-52-7Relevant academic research and scientific papers
Stereoselective synthesis of natural (2E,4E)-dienamides and their synthetic analogs
Shakhmaev,Ishbaeva,Zorin
, p. 908 - 913 (2012/11/06)
A procedure has been developed for stereoselective synthesis of a number of naturally occurring (2E,4E)-dienamides and their analogs via palladium-catalyzed reaction of (1E)-1-iodoalk-1-enes with acrylamides. Pleiades Publishing, Ltd., 2012.
Conjugated dienamides, methods of production thereof, compositions containing same and uses thereof
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Page/Page column 14-15, (2010/02/11)
Described are mixtures of at least four of the alkadienamides defined according to the structure: wherein R represents C1 - C2 n-alkyl; R1 is 2-methyl-1-propyl and R2 is hydrogen, or R1 and R2 taken together is a moiety having the formula wherein n is 4 or 5, or compositions containing substantial concentrations of such mixtures, prepared according to novel processes: (a) extraction of a ground substantially dried fruit of one of the Piper species, Piper longum Linn orPiper peepuloides; (b) natural product-forming synthesis; or (c) synthetic product-forming synthesis. Also described are uses of the thus-formed products for augmenting, enhancing or imparting an aroma, taste, chemesthetic effect and/or antibacterial effect in or to a consumable material and/or in the oral cavity and/or on the mammalian epidermis.
Stereoselective enzymatic synthesis of cis-pellitorine, a taste active alkamide naturally occurring in tarragon
Ley, Jakob P.,Hilmer, Jens-Michael,Weber, Berthold,Krammer, Gerhard,Gatfield, Ian L.,Bertram, Heinz-Juergen
, p. 5135 - 5140 (2007/10/03)
The alkamide cis-pellitorine [(2E,4Z)-N-isobutyldeca-2,4-dienamide] that occurs naturally in tarragon was prepared in yields up to 80% by lipase-catalyzed conversion of ethyl 2E,4Z-decadienoate, the so-called pear ester, and isobutylamine both with and without the use of cosolvents. Of 13 different commercial enzyme preparations tested (lipases, proteases, esterases), only the lipase type B from Candida antarctica has a suitable activity. The reaction of the different geometric isomers of ethyl 2,4-decadienoate to the appropriate pellitorines shows a remarkable selectivity: the 2E,4Z ester is converted between 1.4 and 3.9 times faster than the 2E,4E isomer, and the relative yield of cis-pellitorine compared with trans-pellitorine is 5.7 to 16.3 times higher. In contrast to the better known frans-pellitorine, which at 10 ppm is only slightly tingling and numbing, cis-pellitorine shows very interesting pungent and warming sensations after tasting trials already in low concentrations of 10 ppm. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.
USE OF TRANS-PELLITORIN IN THE FORM OF AN AROMATIC SUBSTANCE
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Page 15; 16, (2008/06/13)
The invention relates to the use of N-isobutylamide 2E, 4E-decadien acid (trans-pellitorin) in the form of an aromatic substance, in particular a saliva stimulating aromatic substance preferably for food, buccal hygiene or gustatory preparations. The preparations, semifinished products, compounds of odorant, aromatic and gustatory substances which contain trans-pellitorin and a method for the production of said trans-pellitorin are also disclosed.
Stereoselective synthesis of naturally occurring unsaturated amide alkaloids by a modified Ramberg-Baecklund reaction
Li, Yang,Zhang, Yu,Huang, Zhi,Cao, Xiaoping,Gao, Kun
, p. 622 - 630 (2007/10/03)
A convenient and rapid approach for the synthesis of naturally occurring unsaturated amide alkaloids 1a-1n by the recently developed one-flask Ramberg-Baecklund reaction is described. The starting material was alcohol 3, which was transformed into thiolacetate 4 using the Mitsunobu reaction. In situ cleavage of acetyl moiety of 4, followed by alkylation of the resulting thiol with appropriate chloroacetamide 5, provided the sulfide 6. Oxidation of sulfide 6 gave the corresponding sulfone 2. Treatment of the sulfone 2 with the dibromodifluoromethane in the presence of alumina-supported potassium hydroxide in dichloromethane solution afforded unsaturated amide alkaloids 1a-1n. To the best of our knowledge, the synthesis of 1e and 1i was reported for the first time.
PRODUCTION OF CIS-PELLITORIN AND USE AS A FLAVOURING
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Page 15, (2008/06/13)
The invention relates to a method for producing 2E,4Z-decadienoic acid-N-isobutylamide (cis-pellitorin) and the use thereof as a pungent agent and a flavouring that generates heat, preferably in foodstuffs, oral hygiene or gourmet preparations.
Ene reaction with pummerer-type reaction intermediate of α-(methylthio)isobutyl acetamide: A new synthesis of pellitorine
Chen, Ling-Ching,Kang, Iou-Jiun,Wang, Huey-Min
, p. 963 - 966 (2007/10/03)
Pummerer-type reaction intermediate 2 of α-(methylthio)isobutyl acetamide (1) has been found to react with 1-alkenes to afford ene adducts 3. Pellitorine 4 was synthesized from the adduct 3d.
A synthetic approach to natural dienamides of insecticidal interest
Abarbri, Mohamed,Parrain, Jean-Luc,Duchene, Alain
, p. 239 - 249 (2007/10/03)
An efficient synthesis of dienamides of insecticidal interest has been stereoselectively achieved featuring a Stille cross-coupling reaction as the key step.
Ene Reaction of Pummerer-Type Reaction Intermediate and Synthesis of Pellitorine
Lin, Wei-Shing,Wang, Huey-Min,Chen, Ling-Ching
, p. 159 - 161 (2007/10/03)
Pummerer-type reaction intermediate 2 of α-(methylthio)acetic acid (1) has been found to react with 1-alkenes to afford ene adducts 3. Pellitorine S was synthesized from the adduct 3d.
Dilithiated (E)-N-isobutyl-4-tosyl-2-butenamide: An allyl sulfone dianion for the regiospecific γ-functionalization of crotonamide dianion
Caturla, Francisco,Najera, Carmen
, p. 4787 - 4790 (2007/10/03)
(E)-N-Isobutyl-4-tosyl-2-butenamide (5b) (prepared from vinylacetic acid by stereoselective iodosulfonylation-dehydroiodination and further amidation) has been lithiated with two equiv of n-butyllithium at -78°C in the presence of DMPU leading to the corresponding allyl dianion 6. This intermediate reacts with electrophiles (alkyl bromides, aldehydes and electrophilic olefins) regiospecific and stereoselectively at the γ-position to afford γ-substituted (E)-N-isobutyl-4-tosyl-2-butenamides 7. Desulfonylation of compounds 7 occurs stereoselectively to provide (E)-β,γ-unsaturated amides 9. This methodology has been applied to the synthesis of dienamides such as naturally occurring N-isobutyl-(2E,4E)-decadienamide (pellitorine).
