Redox Reaction in the Cyclization-Aromatization of (R)-(+)-Citronellal With Fecl3/Acetic Anhydrid

Cahyono, Edy; Muchalal, Muchalal; Pranonowo, Harno Dwi

doi:10.20885/eksakta.vol11.iss2.art6

Cited by 3 publications

(4 citation statements)

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“…Citronellal is one of monoterpenes in citronella oil. The citronellal content of high quality oil is 28-45% [1]. Citronellal has two optical isomeric with molecular weight of 154.25.…”

Section: Introductionmentioning

confidence: 99%

Analysis Of The Enantiomers Ratio Of Citronellal From Indonesian Citronella Oil Using Enantioselective Gas Chromatography

Cahyono

Pranowo

Muchalal

et al. 2014

Mal. J. Fund. Appl. Sci.

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Citronellal 97,3% has been isolated from Java citronella oil (Cymbopogon winterianus) from Yogyakarta Indonesia by fractional distillation under reduced pressure (5 cmHg, 110-120 oC). Citronellal has two optical isomerics that can be separated by capillary column of chiral GC phase. Enantioselective capillary GC with heptakis(2,3-di-O-acetyl-6-O-tert-butyldimethylsilyl)-β-cyclodextrin (β-DEX-225) as stationary phase has been used for analysis of the enantiomers ratio of citronellal. The analysis of enantiomer ratio showed that citronellal contain of 88.21% ee of (R)-(+)-citronellal. Physical properties of isolated citronellal showed that the compound was (+) enantiomer. Structure identification of citronellal was carried out by GC-MS, IR, and 1H NMR, resulted identical fragment and spectra with standard citronellal. Theoretical study with semiempirical-AM1 method showed that energy of (R)-(+)-citronellal on the β-DEX 225 was lower than its (S)-(-)-citronellal.

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“…Citronellal is one of monoterpenes in citronella oil. The citronellal content of high quality oil is 28-45% [1]. Citronellal has two optical isomeric with molecular weight of 154.25.…”

Section: Introductionmentioning

confidence: 99%

Analysis Of The Enantiomers Ratio Of Citronellal From Indonesian Citronella Oil Using Enantioselective Gas Chromatography

Cahyono

Pranowo

Muchalal

et al. 2014

Mal. J. Fund. Appl. Sci.

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“…Soil is one of the important land components in providing agricultural products. As a growing medium for plants, soil has the role of storing and supplying the nutrients needed by plants [1]. Fertile soil has the characteristics of a deep profile, loose structure, neutral pH, sufficient nutrient content for plants, and there are no limitations in the soil for plant growth [2].…”

Section: Introductionmentioning

confidence: 99%

“…Soil erodibility studies on each slope are needed, especially in areas that have the potential for soil erosion, such as in the Nawungan, to be able to adapt appropriate soil conservation techniques at the research location. Based on the background explained previously, the objectives of this research were to: (1) analyze the erodibility index at each different slope at the research location and (2) evaluate the effect of soil erodibility on the potential productivity of agricultural land at the research location.…”

Section: Introductionmentioning

confidence: 99%

Soil Erodibility: Influencing Factors and Its Relation to Soil Fertility in Nawungan, Selopamioro, Bantul Regency

Sholihah,

Pulungan,

Rizqi

2023

BIO Web Conf.

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Soil erodibility is used to determine the sensitivity of the soil to erosion that occurs on dry, sloping land. Slope is a factor that influences the erodibility index and can affect land productivity. Therefore, this study aims to analyze the erodibility index at each different slope and to evaluate the effect of erodibility on the potential productivity of agricultural land in terms of soil fertility at the research location. Data analysis was carried out quantitatively and qualitatively. Field measurements and laboratory tests were carried out to collect landscape characteristics and soil data, qualitative measurements with the Dry Soil Test Kit (PUTK) were used to measure potential soil fertility. Data processing using the Stepwise-Regression method was carried out to determine the factors that most influence the erodibility index at the research location, and crosstabulation analysis was carried out on erodibility and soil fertility levels. The results showed that the erodibility level at the research location was mostly moderate with the erodibility index in the very gentle slope ranging between 0.17-0.33, in the gentle slope ranging between 0.08-0.16, in the slightly steep slope class ranging between 0.21-0.24, in the steep slope class it ranges from 0.12-0.61. The factors that most influence the erodibility index at the research location is % Dust, % Clay, Organic Material, and Permeability. Based on a qualitative assessment of soil fertility, the productivity potential of agricultural land in the study area is in the low category.

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“…Cyclysation-acetylation of citronellal with FeCl3 Catalyzed showed that in high temperature selectivity to produce IPA was low, and the major product was p-cymene as the side product [10].…”

Section: Introductionmentioning

confidence: 99%

Catalytic Activities of Fe3+- and Zn2+-Natural Zeolite on the Direct Cyclisation-Acetylation of (R)-(+)-Citronellal

Cahyono

Muchalal

Triyono

et al. 2014

Bull. Chem. React. Eng. Catal.

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An investigation on characterisation and catalytic ativities of modified natural zeolite on cyclisationacetylation reaction of (R)-(+)-citronellal was performed. The experimental works involved the isolation of (R)-(+)-citronellal from Javanese citronella (Cymbopogon winterianus) oil by vacuum fractional distillation, the determination of its enantiomers, and the preparation and characterisation of different catalysts i.e. H-natural zeolite (H-Za), Fe 3+ -natural zeolite (Fe 3+ -Za), and Zn 2+ -natural zeolite (Zn 2+ -Za), followed by the examination of their activity and selectivity on cyclisation-acetylation reaction of (R)-(+)-citronellal. The isolated citronellal contained 88.21 ee.% of (R)-(+)-citronellal. The crystallinity and the morphology of the modified zeolites showed that the natural zeolite from Malang Indonesia has the main component of mordenite-type zeolite. The main products of cyclisation-acetylation of (R)-(+)-citronellal were isopulegyl acetate (IPA) and neo-isopulegyl acetate (NIPA). Fe 3+ -Za catalyst showed the highest activity towards IPA and NIPA production but its stereoselectivity was slightly lower than that of Zn 2+ -Za catalyst. It is shown that Lewis acidity plays the role in the formation of acetyl ionic from acetic anhydride.

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Redox Reaction in the Cyclization-Aromatization of (R)-(+)-Citronellal With Fecl3/Acetic Anhydrid

Cited by 3 publications

References 0 publications

Analysis Of The Enantiomers Ratio Of Citronellal From Indonesian Citronella Oil Using Enantioselective Gas Chromatography

Analysis Of The Enantiomers Ratio Of Citronellal From Indonesian Citronella Oil Using Enantioselective Gas Chromatography

Soil Erodibility: Influencing Factors and Its Relation to Soil Fertility in Nawungan, Selopamioro, Bantul Regency

Catalytic Activities of Fe3+- and Zn2+-Natural Zeolite on the Direct Cyclisation-Acetylation of (R)-(+)-Citronellal

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