Tag: M.W=200-250

Noguchi, Hiroshi published the artcileSex-pheromone components and related compounds released by virgin females of Adoxophyes sp. and Adoxophyes orana fasciata (Lepidoptera:Tortricidae), Application of (Z)-Dodec-9-en-1-yl acetate, the publication is Nippon Oyo Dobutsu Konchu Gakkaishi (1985), 29(4), 278-83, database is CAplus.

A number of sex-pheromone components and related compounds were extracted from Adoxophyes sp. (smaller tea tortrix, STT) and A. orana fasciata (summer fruit tortrix, SFT) and identified. In the present study, sex pheromones from virgin females were collected by the filter paper adsorption method and the glass-wall adsorption method to investigate the pheromones. The efficiency of collection by the filter paper method was �0-times greater than that by the glass wall method. However, there was no difference in the ratio of pheromonal components between 2 collection methods. The amount of pheromones and their related compounds released from STT was �-times greater than that from SFT, but almost the same quantity of alcs. were discharged by each species. Sixteen acetates and 10 alcs. were detected in the female STT pheromone mixture and 11 acetates and 7 alcs. in the female SFT pheromone mixture

Nippon Oyo Dobutsu Konchu Gakkaishi 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, Application of (Z)-Dodec-9-en-1-yl acetate.

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

Kishikawa, Keiki published the artcileSimple and Efficient Chiral Dopants to Induce Blue Phases and Their Optical Purity Effects on the Physical Properties of Blue Phases, Safety of Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, the publication is Journal of Physical Chemistry B (2014), 118(34), 10319-10332, database is CAplus and MEDLINE.

Blue phases (BPs) have received considerable attention as light shutters in the next generation of liquid crystal (LC) displays. However, no simple and efficient chiral dopant for induction of BPs of com. available rodlike LC compounds has been reported. In this study, both (R) and (S) forms of novel chiral dopants were synthesized, showed extremely high helical twisting power values in nematic LC compounds, and induced stable BPs with a small amount of our chiral dopants (3-5 mol %). In enantiomeric excess controlled experiments, we found novel phenomena in their phys. properties, such as generation of a metastable chiral nematic phase between an isotropic state and a BP.

Journal of Physical Chemistry B 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, Safety of Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate.

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

Liu, Huaqing published the artcileNew Methylene Homologation Method for Cyclic Ketones, Application In Synthesis of 1031335-15-5, the publication is Chemistry – A European Journal (2012), 18(38), 11889-11893, S11889/1-S11889/48, database is CAplus and MEDLINE.

An efficient single methylene homologation of a broad range of both sym. and asym. cyclic ketones by adding lithium trimethylsilyl diazomethane (LTMSD), followed by treatment with silica gel as a mild proton source and promoter of ring expansion, is disclosed.

Chemistry – A European Journal published new progress about 1031335-15-5. 1031335-15-5 belongs to esters-buliding-blocks, auxiliary class Aliphatic cyclic hydrocarbon,Ketone,Ester,Amide, name is tert-Butyl (4-oxocycloheptyl)carbamate, and the molecular formula is C12H21NO3, Application In Synthesis of 1031335-15-5.

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

Zhao, Chen published the artcileDesign of a New Histamine H₃ Receptor Antagonist Chemotype: (3aR,6aR)-5-Alkyl-1-aryl-octahydropyrrolo[3,4-b]pyrroles, Synthesis, and Structure-Activity Relationships, HPLC of Formula: 370880-09-4, the publication is Journal of Medicinal Chemistry (2009), 52(15), 4640-4649, database is CAplus and MEDLINE.

A new histamine H₃ receptor (H₃R) antagonist chemotype I (R¹ = aryl, R² = alkyl) was designed by combining key pharmacophoric elements from two different precursor structural series and then simplifying and optimizing the resulting combined structural features. First, analogs were made based on a previously identified conessine-based H₃R antagonist series. While the first analogs II and 4b-epi-II showed no antagonistic activity to H₃R, the mere addition of a key 4-cyanophenyl moiety, found in a reference compound (ABT-239), in place of the methoxyl group elevated the series to high potency at H₃R. The resulting hybrid structure was judged too synthetically demanding to enable an extensive SAR study, thus forcing a strategy to simplify the chem. structure. The resulting (3aR,6aR)-5-alkyl-1-aryl-octahydropyrrolo[3,4-b]pyrrole series proved to be highly potent, as exemplified by III having a human H₃K_i of 0.54 nM, rat H₃K_i of 4.57 nM, and excellent pharmacokinetics (PK) profile in rats (oral bioavailability of 39% and t_1/2 of 2.4 h).

Journal of Medicinal Chemistry published new progress about 370880-09-4. 370880-09-4 belongs to esters-buliding-blocks, auxiliary class Other Aliphatic Heterocyclic,Chiral,Amide, name is (3aR,6aR)-tert-Butyl hexahydropyrrolo[3,4-b]pyrrole-1(2H)-carboxylate, and the molecular formula is C8H15NO, HPLC of Formula: 370880-09-4.

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

Julia, Marc published the artcileSyntheses via sulfones. XXXVII. Synthesis of three pheromones with a Z double bond: (Z)-8-DDA, (Z)-9-DDA, and (Z)-9-TDA, Application of (Z)-Dodec-9-en-1-yl acetate, the publication is Tetrahedron (1986), 42(9), 2469-74, database is CAplus.

The title compounds, Z-8-dodecen-1-yl acetate, Z-9-dodecen-1-yl acetate, and Z-9-tetradecen-1-yl acetate, have been synthesized in 3 efficient steps. The reaction mixture from lithiated HO(CH₂)_nSO₂Ph (n = 8, 9) and Me(CH₂)_mCHO (m = 1-3) was quenched with Ac₂O yielding a diastereoisomeric mixture of β-acetoxy sulfones. Convergent elimination with powd. NaOH led to E-Me(CH₂)_mCH:C(SO₂Ph)(CH₂)_n-1OAc. Stereospecific hydrogenolysis of the sulfonyl group was carried out with sodium dithionite leading to the unsaturated alcs. (>99% Z), which were reesterified.

Tetrahedron 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, Application of (Z)-Dodec-9-en-1-yl acetate.

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

Batista-Pereira, Luciane G. published the artcileIsolation, Identification, Synthesis, and Field Evaluation of the Sex Pheromone of the Brazilian Population of Spodoptera frugiperda, Application of (Z)-Dodec-9-en-1-yl acetate, the publication is Journal of Chemical Ecology (2006), 32(5), 1085-1099, database is CAplus and MEDLINE.

Several studies have shown intraspecific geog. variation in the composition of sex pheromones. Pheromone lures from North America and Europe were not effective against the fall armyworm Spodoptera frugiperda (Smith, 1797) (Lepidoptera: Noctuidae) in Brazil, so the authors examined the composition of the sex pheromone produced by females from Brazilian populations. Virgin female gland extracts contained (Z)-7-dodecenyl acetate (Z7-12:Ac), (E)-7-dodecenyl acetate (E7-12:Ac), dodecyl acetate, (Z)-9-dodecenyl acetate, (Z)-9-tetradecenyl acetate (Z9-14:Ac), (Z)-10-tetradecenyl acetate, tetradecyl acetate/(Z)-11-tetradecenyl acetate (Z11-16:Ac), and (Z)-11-hexadecenyl acetate. The relative proportions of each acetate were 0.8:1.2:0.6:traces:82.8:0.3:1.5:12.9, resp. This is the first time that E7-12:Ac has been reported from the pheromone gland of S. frugiperda. Only three compounds, Z9-14:Ac, Z7-12:Ac, and E7-12:Ac, elicited antennal responses, and there were no differences in catch between traps baited with either Z7-12:Ac + Z9-14:Ac or Z7-12:Ac + Z9-14:Ac + Z11-16:Ac blends. However, the Z7-12:Ac + Z9-14:Ac + E7-12:Ac blend was significantly better than Z7-12:Ac + Z9-14:Ac, indicating that E7-12:Ac is an active component in the sex pheromone of the Brazilian populations of S. frugiperda.

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 C14H26O2, Application of (Z)-Dodec-9-en-1-yl acetate.

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

Masschelein, Kurt G. R. published the artcileExploiting the regioselectivity of pyroglutamate alkylations for the synthesis of 6-azabicyclo[3.2.1]octanes and 4-azabicyclo[3.3.0]octanes, HPLC of Formula: 942603-91-0, the publication is Tetrahedron (2007), 63(22), 4712-4724, database is CAplus.

The preparation of 6-azabicyclo[3.2.1]octanes and 4-azabicyclo[3.3.0]octanes via regioselective alkylation and ring closure of pyroglutamates is described. Depending on the N-protecting group of pyroglutamates, the reactivity can be directed to the formation of 6-azabicyclo[3.2.1]octanes, e.g. I, or 4-azabicyclo[3.3.0]octanes, e,.g. II, which are conformationally restricted glutamate analogs. The stereoselectivity is also discussed.

Tetrahedron published new progress about 942603-91-0. 942603-91-0 belongs to esters-buliding-blocks, auxiliary class Other Aliphatic Fused-Heterocycles, name is Ethyl 2-methylene-5-oxohexahydro-1H-pyrrolizine-7a-carboxylate, and the molecular formula is C11H15NO3, HPLC of Formula: 942603-91-0.

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

Skwierczynska, Malgorzata published the artcileRatiometric Upconversion Temperature Sensor Based on Cellulose Fibers Modified with Yttrium Fluoride Nanoparticles, Formula: C10H12O5, the publication is Nanomaterials (2022), 12(11), 1926, database is CAplus and MEDLINE.

In this study, an optical thermometer based on regenerated cellulose fibers modified with YF₃: 20% Yb³⁺, 2% Er³⁺ nanoparticles was developed. The presented sensor was fabricated by introducing YF₃ nanoparticles into cellulose fibers during their formation by the so-called Lyocell process using N-methylmorpholine N-oxide as a direct solvent of cellulose. Under near-IR excitation, the applied nanoparticles exhibited thermosensitive upconversion emission, which originated from the thermally coupled levels of Er³⁺ ions. The combination of cellulose fibers with upconversion nanoparticles resulted in a flexible thermometer that is resistant to environmental and electromagnetic interferences and allows precise and repeatable temperature measurements in the range of 298-362 K. The obtained fibers were used to produce a fabric that was successfully applied to determine human skin temperature, demonstrating its application potential in the field of wearable health monitoring devices and providing a promising alternative to thermometers based on conductive materials that are sensitive to electromagnetic fields.

Nanomaterials 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 C4H3Cl2N3, Formula: C10H12O5.

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

Dunkelblum, E. published the artcileIdentification of sex pheromone components from pheromone gland volatiles of the tomato looper, Plusia chalcites (Especially), Formula: C14H26O2, the publication is Journal of Chemical Ecology (1987), 13(5), 991-1003, database is CAplus and MEDLINE.

The sex pheromone glands of P. chalcites released dodecyl acetate, (Z)-7-dodecenyl acetate, (Z)-9-dodecenyl acetate, 11-dodecenyl acetate, (Z)-8-tridecenyl acetate, and (Z)-9-tetradecenyl acetate. A combination of capillary gas chromatog., gas chromatog.-mass spectrometry, and di-Me disulfide derivatization enabled a rigorous identification of all these compounds, some of which were previously found in gland extracts Bioassays in a flight tunnel showed that a ternary blend of (Z)-7-dodecenyl acetate, (Z)-9-dodecenyl acetate, and (Z)-9-tetradecenyl acetate elicited directed flights from 85-100% of the males tested and elicited copulation attempts, at the end of the flights, from 44-74% of the males tested. This blend was equal in activity to the natural gland extract Addition of the other acetates had only a slight influence on the activity of this mixture Substitution of either (Z)-9-dodecenyl acetate or (Z)-9-tetradecenyl acetate in this blend by 11-dodecenyl acetate gave 2 ternary mixtures which also elicited high levels of courtship activity, almost as high as that of the original blend. Addition of (Z)-7-dodecenyl alc. inhibited almost totally the flight activity of males.

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 C14H26O2, Formula: C14H26O2.

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

Niwa, Christine G. published the artcileSex pheromone chemistry of the southwestern pine tip moth (Lepidoptera: Tortricidae), Quality Control of 16974-11-1, the publication is Environmental Entomology (1992), 21(6), 1410-13, database is CAplus.

Chem. anal. and field bioassays were conducted to identify major components of the sex pheromone of the southwestern pine tip moth, R. neomexicana. E-9-dodecenyl acetate was the most abundant pheromone component in gland washes, with 0.5-1.5 ng per female equivalent Z-9-dodecenyl acetate, and E- and Z-9-dodecenol were also present. A ratio of �0:20 E:Z-9-dodecenyl acetate was the most attractive bait in field trapping. No males were caught in traps baited with a blend of E- and Z-9-dodecenol, and addition of these alcs. at about a 3:1 acetate/alc. ratio did not improve attractiveness to E- and Z-9-dodecenyl acetate baits. The role of pheromones in mating isolation of this species is discussed.

Environmental Entomology 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