Periodic Terpolymerization of Cyclooligoarsine, Cyclooligostibine, and Acetylenic Compound

2007 ◽  
Vol 40 (5) ◽  
pp. 1372-1376 ◽  
Author(s):  
Kensuke Naka ◽  
Akiko Nakahashi ◽  
Yoshiki Chujo
Keyword(s):  
Acetylenic Compound

ChemInform Abstract: AN UNUSUAL TRANSANNULAR REACTION IN AN EIGHT-ATOM RING DURING HYDRATION OF AN ACETYLENIC COMPOUND

1977 ◽  
Vol 8 (43) ◽  
pp. no-no
Author(s):  
R. BALASUBRAMANIAN ◽  
K. RAJAGOPALAN ◽  
K. G. SRINIVASAN ◽  
S. SWAMINATHAN
Keyword(s):  
Acetylenic Compound ◽  
Transannular Reaction

Chemical Structure-Odor Correlation in a Series of Synthetic n-Nonen-1-ols

1995 ◽  
Vol 50 (11-12) ◽  
pp. 757-765 ◽  
Author(s):  
Yasunobu Sakoda ◽  
Kenji Matsui ◽  
Tadahiko Kajiwara ◽  
Akikazu Hatanaka
Keyword(s):  
Principal Component Analysis ◽  
Double Bond ◽  
Spatial Structure ◽  
Chemical Structure ◽  
Principal Component ◽  
Component Analysis ◽  
Acetylenic Compound ◽  
Analysis Method ◽  
Entire Series ◽  
Novel Method

In order to elucidate chemical structure-odor correlation in the all isomers of n-nonen-1- ols, an entire series of these alcohols were synthesized stereo-selectively in high purity. For unequivocal syntheses of them, geometrically selective hydrogenation of the respective acetylenic compound was adopted. The synthesized alcohols were converted to their 3,5-dinitrobenzoate derivatives with 3,5-dinitrobenzoyl chloride, and then purified by repeated recrystallization. Chemical structure-odor correlations in all the isomers of n-nonen-1-ols were elucidated by introducing a novel method to evaluate odor characteristics and by treating the obtained data statistically with the principal component analysis method (Cramer et al., 1988). The odor profiles of the tested compounds were attributable largely to the positions of the carbon- double bond. The geometries of compounds had only a little effect. With the principal component analysis, the odor profiles of the series of compounds were successfully integrated into the first and the second principal components. The first component (PC-1) consisted of combined characteristics of fruity, fresh, sweet, herbal and oily-fatty, in which herbal and oily-fatty were conversely correlated each other to the position of double-bond of the tested compounds. Of these, only (6Z)-nonen-1-ol deviated markedly from the correlation, indicative of some special interaction between the spatial structure of this compound and the sensory machinery of human.

Construction of Layered B3N3-Doped Graphene Sheets from an Acetylenic Compound Containing B3N3 by a Semisynthetic Strategy

2019 ◽  
Vol 11 (36) ◽  
pp. 33245-33253 ◽  
Author(s):  
Chen Chen ◽  
Kangkang Guo ◽  
Yaping Zhu ◽  
Fan Wang ◽  
Weian Zhang ◽  
...  
Keyword(s):  
Graphene Sheets ◽  
Acetylenic Compound ◽  
Doped Graphene

BIOPESTICIDE POTENTIAL OF (7R)-TRANS, TRANS-NEPETALACTONE AND CIS-LACHNOPHYLLUM ESTER IN CONTROL OF MUSTARD APHID, LIPAPHIS ERYSIMI (KALT.)

2015 ◽  
Vol 77 (2) ◽  
Author(s):  
Vinod Kumar ◽  
Chandra Shekhar Mathela ◽  
Geeta Tewari ◽  
Ajay Kumar Pandey
Keyword(s):  
Essential Oils ◽  
Insecticidal Activity ◽  
2D Nmr ◽  
Positive Control ◽  
Lipaphis Erysimi ◽  
Acetylenic Compound ◽  
Mustard Aphid ◽  
Synthetic Pesticide ◽  
Natural Pesticides ◽  
Erigeron Annuus

(7R)-trans, trans-nepetalactone; a monoterpene iridoid (1) and acetylenic compound named cis-lachnophyllum ester (2) were isolated from the essential oils of Nepeta elliptica and Erigeron annuus, respectively and characterized using a combination of their spectral data  (1D-and 2D-NMR, MS, IR). Compound 1 and 2 were tested for biopesticide activity against mustard aphid, Lipaphis erysimi (Kalt.). Compound 1 exhibited high insecticidal activity towards L. erysimi with LC50 values of 2.18 and 2.73 mg/mL; LT50 values of 15.24 and 17.18 h. Compound 2 also displayed significant insecticidal activity having LC50 values of 0.85 and 4.70 mg/mL; LT50 values of 13.25 and 26.2 h. The activity of compounds 1 and 2 were comparable with synthetic pesticide, monocrotophos used as positive control and thus has potential as natural pesticides for use in economically important crops.

scholarly journals Diacetyl-atractylodiol, a new acetylenic compound from Atractylodes japonica KOIDZUMI.

1974 ◽  
Vol 22 (8) ◽  
pp. 1943-1945 ◽  
Author(s):  
ITIRO YOSIOKA ◽  
TADATO TANI ◽  
MIHOKO HIROSE ◽  
ISAO KITAGAWA
Keyword(s):  
Acetylenic Compound ◽  
Atractylodes Japonica

5-Decynedioic Acid, an Acetylenic Compound in Human Urine

1975 ◽  
Vol 21 (13) ◽  
pp. 1964-1969 ◽  
Author(s):  
Sven Lindstedt ◽  
Göran Steen
Keyword(s):  
Mass Spectrometry ◽  
Infrared Spectroscopy ◽  
Mass Spectrum ◽  
Dicarboxylic Acid ◽  
Human Urine ◽  
Triple Bond ◽  
Osmium Tetroxide ◽  
Mass Spectrometric ◽  
Acetylenic Compound ◽  
Mass Spectrometric Evidence

Abstract An acetylenic dicarboxylic acid, 5-decynedioic acid, has been isolated from human urine. The structure was determined by mass spectrometry of several derivatives, and by infrared spectroscopy. On osmium tetroxide oxidation, a vic-diketone was formed, the mass spectrum of which established the position of the triple bond between carbon atoms 5 and 6. Mass spectrometric evidence for the presence of a small amount of the isomeric 4-decynedioic acid was also obtained. The 24-h excretion of these acids is 0.01-0.1 mmol for healthy adults on a regular diet.

A sesquiterpene-coumarin ether and an acetylenic compound from Tanacetum heterotomum

1988 ◽  
Vol 27 (5) ◽  
pp. 1527-1529 ◽  
Author(s):  
Nezhun Gören ◽  
Ayhan Ulubelen ◽  
Sevil :Oksüz
Keyword(s):  
Acetylenic Compound

scholarly journals Reactions of glutamate semialdehyde aminotransferase (glutamate-1-semialdehyde 2,1 aminomutase) with vinyl and acetylenic substrate analogues analysed by rapid scanning spectrophotometry

1995 ◽  
Vol 309 (1) ◽  
pp. 307-313 ◽  
Author(s):  
R J Tyacke ◽  
R Contestabile ◽  
B Grimm ◽  
J L Harwood ◽  
R A John
Keyword(s):  
Absorption Spectrum ◽  
Succinic Semialdehyde ◽  
Slow Inactivation ◽  
Acetylenic Compound ◽  
Potential Mechanism ◽  
Prosthetic Group ◽  
Single Turnover ◽  
Spectral Changes ◽  
Substrate Analogues ◽  
Rapid Scanning

The reactions occurring when glutamate-1-semialdehyde amino-transferase (glutamate-1-semialdehyde 2,1 aminomutase, EC 5.4.3.8) was treated with two potential mechanism-based inactivators, namely 4-aminohex-5-enoate and 4-aminohex-5-ynoate, have been investigated by monitoring rapid transient changes in the absorption spectrum of the enzyme's prosthetic group, pyridoxal 5′-phosphate. In both cases a short-lived chromophore absorbing maximally at about 500 nm was formed in a few milliseconds. In the case of the vinyl analogue (4-aminohex-5-enoate) this chromophore, considered to be a quinonoid intermediate, converted rapidly into the pyridoxamine phosphate form of the co-enzyme in a single turnover which was accompanied by negligible inactivation. However, slow inactivation of the enzyme by this compound was observed when the enzyme was made to undergo multiple turnovers by including the efficient aldehyde substrate, succinic semialdehyde. The acetylenic compound, aminohexynoate, produced more complex spectral changes with the consecutive formation of compounds absorbing maximally at 496 nm, 450 nm, 564 nm and 330 nm. The enzyme was 90% inactivated by aminohexynoate within 10 s and thereafter lost no further activity unless aldehyde substrate was added. Mechanisms and kinetic constants consistent with the observations are proposed for each compound. The observation that the acetylenic compound is a much more potent inactivator than its vinyl analogue is attributed to the occurrence of a conjugated allene as intermediate.

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