Tag: M.W=200-250

Shibata, Makoto published the artcileTotal syntheses of patellamides, cytotoxic cyclic peptides from a marine tunicate, Recommanded Product: (R)-tert-Butyl (3-methyl-1-oxobutan-2-yl)carbamate, the publication is Tennen Yuki Kagobutsu Toronkai Koen Yoshishu (1985), 267-74, database is CAplus.

The structures of patellamides A, B, and C have been proposed to be cyclic peptides I, II, and III, resp. I and II were synthesized by solution methods, but these synthetic peptides were not identical with natural patellamides B and C. An inspection of evidences used for the originally assigned structures and a synthetic study on the partial hydrolyzate of patellamide B indicated that the structures of patellamides B and C could be reassigned as cyclic peptides IV and V, resp., having the reverse order of amino acid residues. This deduction was confirmed by the syntheses of revised structures IV and V, which were completely identical with natural patellamides B and C, resp. The structures of patellamide A was analogously revised as cyclic peptide VI by its synthesis.

Tennen Yuki Kagobutsu Toronkai Koen Yoshishu published new progress about 106391-88-2. 106391-88-2 belongs to esters-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Aldehyde, name is (R)-tert-Butyl (3-methyl-1-oxobutan-2-yl)carbamate, and the molecular formula is C8H6ClN, Recommanded Product: (R)-tert-Butyl (3-methyl-1-oxobutan-2-yl)carbamate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Rosen, Wen Qi published the artcileThe circadian rhythm of the sex-pheromone-mediated behavioral response in the turnip moth, Agrotis segetum, is not controlled at the peripheral level, Quality Control of 16974-11-1, the publication is Journal of Biological Rhythms (2003), 18(5), 402-408, database is CAplus and MEDLINE.

The pheromone-mediated upwind flight of male turnip moths was observed in a flight tunnel at different times of day under conditions of a light-dark (LD) cycle, constant darkness (DD), and a shifted photoperiod. Under both LD and DD conditions, a significantly larger number of males flew to the pheromone during both the scotophase and the subjective scotophase than during the photophase and the subjective photophase for 2 consecutive days. When 1-day-old moths were transferred to a shifted LD cycle with lights turned off 4 h earlier, male behavioral responses to the pheromone advanced in time accordingly by 4 h. This showed that male behavioral responses to the pheromone are under the control of an endogenous oscillator. To further examine the level at which the circadian rhythm of the male behavioral response is regulated, the authors tested the olfactory responses of male antennal receptors to pheromone stimuli by means of electroantennograms (EAG) at different times of day. No significant variation in the sensitivity of the male antennal response to the pheromone was observed in terms of time of day. The results suggest that circadian regulation of the rhythmic behavioral response to pheromones in the male Agrotis occurs at the central nervous system level.

Journal of Biological Rhythms published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C14H26O2, Quality Control of 16974-11-1.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Yang, Chang Yeol published the artcileSex Pheromones and Reproductive Isolation of Three Species in Genus Adoxophyes, Computed Properties of 16974-11-1, the publication is Journal of Chemical Ecology (2009), 35(3), 342-348, database is CAplus and MEDLINE.

We tested differences in female pheromone production and male response in 3 species of the genus Adoxophyes in Korea. Females of all 3 species produced mixtures of (Z)-9-tetradecenyl acetate (Z9-14:OAc) and (Z)-11-tetradecenyl acetate (Z11-14:OAc) as major components but in quite different ratios. The ratio of Z9-14:OAc and Z11-14:OAc in pheromone gland extracts was estimated to be ∼100:200 for Adoxophyes honmai, 100:25 for Adoxophyes orana, and 100:4000 for Adoxophyes sp. Field tests showed that males of each species were preferentially attracted to the 2-component blends of Z9-14:OAc and Z11-14:OAc mimicking the blends found in pheromone gland extracts of conspecific females. The effects of minor components identified in gland extracts on trap catches varied with species. Addition of 10-methyldodecyl acetate (10me-12:OAc) or (E)-11-tetradecenyl acetate (E11-14:OAc) to the binary blend of Z9-14:OAc and Z11-14:OAc significantly increased captures of A. honmai males, whereas E11-14:OAc exhibited a strongly antagonistic effect on catches of Adoxophyes sp. males. Moreover, (Z)-9-tetradecen-1-ol (Z9-14:OH) or (Z)-11-tetradecen-1-ol (Z11-14:OH) added to the binary blends increased attraction of male A. orana but not A. honmai and Adoxophyes sp. males, suggesting that these minor components, in addition to the relative ratios of the 2 major components, play an important role in reproductive isolation between Adoxophyes species in the southern and midwestern Korea where these species occur sympatrically.

Journal of Chemical Ecology published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C10H10O2, Computed Properties of 16974-11-1.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Blank-Porat, Diana published the artcileThe anticancer prodrugs of butyric acid AN-7 and AN-9, possess antiangiogenic properties, Recommanded Product: (Pivaloyloxy)methyl butyrate, the publication is Cancer Letters (Amsterdam, Netherlands) (2007), 256(1), 39-48, database is CAplus and MEDLINE.

The antiangiogenic and antineoplastic activities of the butyric acid prodrugs AN-7 and AN-9 were demonstrated in vitro with HUVEC by inhibition of proliferation and vascular tubes formation, enhanced apoptosis, and inhibition of 22Rv-1 cells migration. In the s.c. implanted human prostate tumors (22Rv-1) in nude mice, AN-7 significantly inhibited Ki-67, HIF-1α, HER-2/neu, bFGF and increased PTEN level. AN-7 and AN-9 reduced Hb accumulation in matrigel plugs implanted s.c. in Balb-c mice. Herein, we show that the anticancer activity of AN-7 and AN-9 can be attributed in part to their antiangiogenic activities suggesting potential therapeutic benefits for prostate cancer patients.

Cancer Letters (Amsterdam, Netherlands) published new progress about 122110-53-6. 122110-53-6 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester,Inhibitor, name is (Pivaloyloxy)methyl butyrate, and the molecular formula is C10H18O4, Recommanded Product: (Pivaloyloxy)methyl butyrate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Horiike, Michio published the artcileMass spectrometric indication of double-bond position in dodecenyl acetates based on a fuzzy classification, Recommanded Product: (Z)-Dodec-9-en-1-yl acetate, the publication is Rapid Communications in Mass Spectrometry (1989), 3(4), 100-1, database is CAplus.

Ten positional isomers of dodecenyl acetate were analyzed by conventional combined gas chromatog./electron-ionization mass spectrometry. The relative intensities of some predominant fragments in the isomers examined varied with the double-bond position in the chain. The mass spectra were interpreted in terms of the standard parameters, similarity coefficients, clustering weight and clustering coefficients The original double-bond position in the acetates was located unambiguously.

Rapid Communications in Mass Spectrometry published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C14H26O2, Recommanded Product: (Z)-Dodec-9-en-1-yl acetate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Mijangos, Irene published the artcileMacroradical initiated polymerization of acrylic and methacrylic monomers, Name: Benzyl diethylcarbamodithioate, the publication is Journal of Separation Science (2009), 32(19), 3340-3346, database is CAplus and MEDLINE.

An approach has been developed for the grafting of monomers onto poly(trimethylolpropane trimethacrylate) (polyTRIM) particles using 2,2-di-Et dithiocarbamic acid benzyl ester (DDCABE) as an initiator. A set of polymers was prepared with this technique over different lengths of time and the kinetics of the reaction studied exptl. It was found that the grafting of initiator to the polymeric support followed a second order reaction, while the subsequent addition of monomers from solution into the polyTRIM macroradicals followed a first order reaction. The living nature of the iniferter modified macroradicals permits easy consecutive grafting of multiple polymeric layers, allowing straightforward functionalization of particles. However, the effectiveness of the grafted initiator decreased with each cycle of polymerization This technique can be used for a wide range of applications in anal. and biochem.

Journal of Separation Science published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, Name: Benzyl diethylcarbamodithioate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Subrahmanyam, Sreenath published the artcileOptimisation of experimental conditions for synthesis of high affinity MIP nanoparticles, Recommanded Product: Benzyl diethylcarbamodithioate, the publication is European Polymer Journal (2013), 49(1), 100-105, database is CAplus.

Molecularly imprinted nanoparticles were synthesized via iniferter polymerization in the presence of a chain terminator agent and at high monomer and template concentration The amount of initiator, chain terminator agent and UV irradiation time were optimized in order to achieve maximum yield of discrete nanoparticles without causing macrogelation of the polymerization mixture Resultant particles were then purified from unreacted monomers via gel permeation and characterized by size-exclusion chromatog., dynamic light scattering and electron microscopy. The affinity towards the target was verified via surface plasmon resonance on immobilized templates. The yield of nanoparticles obtained using this approach was 14%, a significant increase when compared with similar methods using high monomer concentration and UV initiation.

European Polymer Journal published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C6H6N2O, Recommanded Product: Benzyl diethylcarbamodithioate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Shen, Yan published the artcileEffects of gallic acid alkyl esters and their combinations with other antioxidants on oxidative stability of DHA algae oil, Computed Properties of 121-79-9, the publication is Food Research International (2021), 110280, database is CAplus and MEDLINE.

The most effective composite antioxidants for DHA algae oil were optimized by combining the selected gallic acid (GA) alkyl ester with other commonly used antioxidants. Results of Rancimat induction time, peroxide value, thiobarbituric acid-reactive substances, and free radical generation indicated that octyl gallate (OG) was the best one in DHA algae oil among GA alkyl esters with various chain lengths. Therefore, OG was used to combine other antioxidants (antioxidant of bamboo leaves, rosemary extract, tea polyphenols, tea polyphenol palmitate (TPP), ascorbyl palmitate, vitamin E, phytic acid and phospholipid) for further improving the oxidative stability of DHA algae oil. The combination of OG + TPP showed the best antioxidant effect among the composite antioxidants of two and three components. Through optimization of mixture ratio, the combination of 53.20 mg/kg OG + 360 mg/kg TPP demonstrated the best antioxidant capacity, which prolonged the shelf life of DHA algae oil by 4.24 folds.

Food Research International published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C14H10O4S2, Computed Properties of 121-79-9.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Dunkelblum, Ezra published the artcileSex attractant blends for field trapping of Agrotis segetum males (Lepidoptera: Noctuidae) in Israel and Germany, Recommanded Product: (Z)-Dodec-9-en-1-yl acetate, the publication is Zeitschrift fuer Naturforschung, C: Journal of Biosciences (1985), 40C(3-4), 272-7, database is CAplus.

Lures for a monitoring system based on sex attractant trapping of A. segetum males were elaborated. Various mixtures of (Z)-5-decenyl acetate  [67446-07-5], (Z)-7-dodecenyl acetate  [14959-86-5], (Z)-9-dodecenyl acetate  [16974-11-1], (Z)-9-tetradecenyl acetate  [16725-53-4], decyl acetate  [112-17-4] and dodecyl acetate  [112-66-3] were tested in 20 different blends. From comparison of all the trap catches, a 4-component lure consisting of (Z)-5-decenyl, (Z)-7-dodecenyl, (Z)-9-tetradecenyl and dodecyl acetate is recommended for monitoring of A. segetum in both countries.

Zeitschrift fuer Naturforschung, C: Journal of Biosciences published new progress about 16974-11-1. 16974-11-1 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (Z)-Dodec-9-en-1-yl acetate, and the molecular formula is C14H26O2, Recommanded Product: (Z)-Dodec-9-en-1-yl acetate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Even, Catherine published the artcileAFM, x-ray diffraction and optical microscopy studies of faceted droplets of a thermotropic bicontinuous cubic mesophase, COA of Formula: C15H14O3, the publication is ChemPhysChem (2002), 3(12), 1031-1034, database is CAplus and MEDLINE.

Droplets of a new thermotropic cubic mesophase are observed at room temperature both by optical microscopy and at. force microscopy. With AFM, steps on the facets are involved in the faceting mechanism of these droplets. The AFM image shows the detail of a facet’s corner and a rough area in between.

ChemPhysChem published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, COA of Formula: C15H14O3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics