Teng-Fei Ji

Jiangsu Institute For Food And Drug Control, Nan-ching, Jiangsu Sheng, China

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Publications (23)12.1 Total impact

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    ABSTRACT: A simple and efficient Knoevenagel condensation between α,β-unsaturated aldehydes and active methylene compounds is reported. This reaction can be catalyzed by PPL (lipase from porcine pancreas) with satisfied yields (49%-92%) and moderate Z/E selectivity.
    Chinese Chemical Letters 05/2014; · 1.18 Impact Factor
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    ABSTRACT: To study the chemical constituents of Cymbopogon citratus, isolation and purification of constituents were carried out on silica gel, Sephadex LH-20 and prepatative HPLC. The structures of the compounds were identified by physicchemical properties and spectral data analysis. Eight compounds were isolated and identified as 3beta-methoxy lanosta-9(11)-en-27-ol (1), 3beta-hydroxylanosta-9 (11)-en (2), (24S) -3beta-methoxylanosta-9(11), 25-dien-24-ol (3), 8-hydroxyl-neo-menthol (4), (2E)-3,7-dimethyl-2,7-octadiene-1, 6-diol (5), (+)-citronellol (6), 7-hydroxymenthol (7) and ethyl nonadecanoate(8). Compounds 1 is a new one. Compounds 2-3 are obtained from C. citratus for the first time.
    05/2014; 39(10):1834-7.
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    ABSTRACT: Two new cucurbitane triterpenoids 1 and 2 were isolated, together with six known compounds, from the seeds of Momordica charantia L. The structures of new compounds were determined to be 3-O-{[β-d-galactopyranosyl(1 → 6)]-O-β-d-galactopyranosyl}-23(R), 24(R), 25-trihydroxycucur-bit-5-ene (1), 3-O-[β-d-galactopyranosyl]-25-O-β-d-galactopyranosyl-7(R), 22(S), 23(R), 24(R), 25-pentahydroxycucurbit-5-ene (2), respectively. Their structures were elucidated by the combination of mass spectrometry, one- and two-dimensional NMR experiments and chemical reactions.
    Journal of Asian natural products research 04/2014; · 0.61 Impact Factor
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    ABSTRACT: Two new oligostilbenes, parthenocissins M (1) and N (2), together with two known compounds, miyabenol C (3) and ϵ-viniferin (4), were isolated from the stem of Parthenocissus quinquefolia. Their structures were elucidated by means of NMR, UV, IR, and MS data.
    Journal of Asian natural products research 03/2014; 16(3):275-80. · 0.61 Impact Factor
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    ABSTRACT: In present study, the anthocyanin composition and content of the fruit of B. heteropoda Schrenk were determined for the first time. The total anthocyanins were extracted from the fruit of B. heteropoda Schrenk using 0.5% HCl in 80% methanol and were then purified using an AB-8 macroporous resin column. The purified anthocyanin extract (PAE) was evaluated by high-performance liquid chromatography with a diode array detector (HPLC-DAD) and HPLC-high resolution-electrospray ionization-mass spectrometry (HPLC-HR-ESI-MS) under the same experimental conditions. The results revealed the presence of seven different anthocyanins. The major anthocyanins purified by preparative HPLC were confirmed to be delphinidin-3-O-glucopyranoside (30.3%), cyanidin-3-O-glucopyranoside (33.5%), petunidin-3-Ο-glucopyranoside (10.5%), peonidin-3-O-glucopyranoside (8.5%) and malvidin-3-O-glucopyranoside (13.8%) using HPLC-HR-ESI-MS and NMR spectroscopy. The total anthocyanin content was 2036.6 ± 2.2 mg/100 g of the fresh weight of B. heteropoda Schrenk fruit. In terms of its total reducing capacity assay, DPPH radical-scavenging activity assay, ferric-reducing antioxidant power (FRAP) assay and ABTS radical cation-scavenging activity assay, the PAE also showed potent antioxidant activity. The results are valuable for illuminating anthocyanins composition of B. heteropoda Schrenk and for further utilising them as a promising anthocyanin pigment source. This research enriched the chemical information of B. heteropoda Schrenk.
    Molecules (Basel, Switzerland). 01/2014; 19(11):19078-96.
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    ABSTRACT: In an attempt to improve the antitumor activity of homocamptothecins (hCPTs), a series of novel 20-O-linked hCPT ester derivatives were first designed and synthesized based on a synthetic route, by which hCPTs are acylated with different substituted phenoxyacetic acid ester derivatives. Most of the derivatives were assayed for in vitro cytotoxicity against six human cancer cell lines KB, KB/VCR, A549, HCT-8, Bel7402, and A2780, and most of the assayed compounds exhibited good antiproliferative activity on these tumor cell lines especially on KB.
    Journal of Asian natural products research 11/2013; · 0.61 Impact Factor
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    ABSTRACT: Chemical examination of the exuded gum resin of Boswellia carterii resulted in the isolation of nine new prenylaromadendrane-type diterpenes, boscartols A-I (1-9). The structures of these compounds were established by extensive 1D and 2D NMR spectroscopic analyses, mass spectrometric data, and circular dichroism spectra. Compounds 1-3, 5, 6, 8, and 9 (10 μM) showed moderate hepatoprotective activity against d-galactosamine-induced HL-7702 cell damage.
    Journal of Natural Products 11/2013; · 3.29 Impact Factor
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    ABSTRACT: Six new phenolic diglycosides, named gymnetinosides A-F (1-6), were isolated from the ethanolic extract of Gymnema tingens, together with three known diglycosides, sequinoside K (7), khaephuoside B (8), and albibrissinoside A (9). The structures of the new compounds were determined by spectroscopic techniques including 1D-, 2D NMR, mass spectroscopy, and circular dichroism. Compounds 1, 5, and 6 showed hepatoprotective activities against D-galactosamine-induced HL-7702 cell damage.
    Planta Medica 05/2013; · 2.35 Impact Factor
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    ABSTRACT: To study the chemical constituents of the fruits of Lycium ruthenicum Murr.. Isolation and purification were carried out on macroporous resin column, Sephadex LH-20 and HPLC. The structures of the compounds were identified by physicochemical properties and spectral analysis. Nine compounds were isolated and identified as N-mono-cinnamoyl-putrescine (1), petunidin-3-trans-p-coumaroylrutinoside-5-glucoside (2), 4-(p-cumaroyl) -methyl-L-rhamnoside (3), p-coumarinic acid (4), ferulic acid (5), rutin (6), quercetin (7), protocatechuric acid (8), malvidin (9). Compound 1 - 9 are obtained from Lycium ruthenicum for the first time.
    Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials 10/2012; 35(10):1599-601.
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    ABSTRACT: A chemical investigation on the aerial parts of Hypericum scabrum L. resulted in the isolation of three new phloroglucinol derivatives, hyperscabrins A (1), B (2), and C (3), together with one known compound, (2R,3R,4S,6R)-3-methyl-4,6-di(3-methyl-2-butenyl)-2-(2-methyl-1-oxopropyl)-3-(4-methyl-3-pentenyl)-cyclohexanone (4). The structures were elucidated by means of spectroscopic methods, including MS, IR, 1D NMR, and 2D NMR, and the absolute configurations of chiral centers in these phloroglucinol derivatives were determined for the first time by studying their circular dichroism spectra.
    Journal of Asian natural products research 05/2012; 14(5):508-14. · 0.61 Impact Factor
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    ABSTRACT: To study the chemical constituents of Ligusticum sinense. The chemical constituents were isolated and purified by column chromatography on silica gel and Sephadex LH-20; Using spectroscopy methods to elucidate their structures. Nine compounds were isolated and identified as levistolide A (1), (Z)-3-butylidene-7-hydroxyphthalide (2), senkyunolide B (3), 3-butylphthalide(4), (Z)-ligustilide (5), riligustilide (6), neocnidilide (7), senkyunolide A (8), beta-sitostesol (9). Compounds 2 and 3 are obtained from this plant for the first time.
    Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials 03/2011; 34(3):378-80.
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    ABSTRACT: To study the chemical constituents of Balaophora polyandra. The chemical constituents were isolated by column chromatography on silica gel, Toyopearl HW-40C and Sephadex LH-20. Their structures were elucidated on the basis of spectral analysis. 8 compounds have isolated from this plant, and the structure of them have identified as Gallic acid (1), Ellagic acid (2), Ferulic acid (3), Caffeic acid (4), p-hydroxylcinnamic acid (5), 1,3-di-O-galloyl-4,6-(S) - hexahydroxydiphenyl-beta-D-glucopyrannose (6),1-O-(E) - caffeoyl- 3-O-galloyl-beta-D-glucopyrannose (7), 2-O-(E) - caffeoyl-1-O-[see symbol] - (E) - coumaroyl-beta-D-glucopyrannose (8). Compounds 1 - 8 are isolated from this plant for the first time.
    Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials 03/2010; 33(3):368-70.
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    ABSTRACT: A new bidesmoside triterpenoid saponin, named stauntoside C1 (1), along with three known saponins (2-4) was isolated from Stauntonia chinensis DC. (Lardizabalaceae). Their structures were established by means of spectral and chemical methods as 3-O-beta-D-xylopyranosyl-(1 --> 2)-O-beta-D-xylopyranosyl-(1 --> 3)-O-alpha-L-rhamnopyranosyl-(1 --> 2)-alpha-L-arabinopyranosyl oleanolic acid 28-O-alpha-L-rhamnopyranosyl-(1 --> 4)-beta-D-glucopyranosyl-(1 --> 6)-beta-D-glucopyranosyl ester (1), scabiosaponin E (2), sieboldianoside B (3), and kizutasaponin K(12) (4).
    Journal of Asian natural products research 02/2010; 12(2):150-6. · 0.61 Impact Factor
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    ABSTRACT: A simple and efficient method for regioselective acylation of mangiferin catalyzed by lipase under ultrasound irradiation is reported. Compared with the conventional methods, its main advantages are shorter reaction time and higher yields. The optimum conditions were screened out. Under the optimal conditions (lipase: PCL, acyl donor: vinyl acetate; reaction solvent: DMSO, reaction temperature: 45 degrees C, ultrasonic power: 200 W; substrate ratio: acyl donor/mangiferin 6/1, enzyme loading: 6 mg/ml), the regioselective acylation yield was up to 84%.
    Journal of Asian natural products research 01/2010; 12(1):56-63. · 0.61 Impact Factor
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    ABSTRACT: To isolate and identify chemical constituents from Phellodendron chinense. Chemical constituents were isolated by silica gel and Sephadex LH-20 column chromatography. The structures of the isolated compounds were determined by spectral means. Ten compounds were isolated and identified as berberine (1), caffeic acid ethyl ester (2), iso-vanillin (3), ferulic acid (4), (+/-)-5,5'-dimethoxylariciresinol (5), Methyl beta-orsellinate (6), gamma-fagirine (7), (+/-)-Lyoniresinol (8), beta-sitosterol (9), stigmasterine (10). Compounds 2-6 are isolated and identified from this genus for the first time.
    Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials 03/2009; 32(2):208-10.
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    ABSTRACT: Two new steroidal saponins, ceparosides C (1) and D (2), have been isolated from the seeds of Allium cepa L. Their structures have been established as 26-O-(beta-D-glucopyranosyl)-(25R)-furost-5,20(22)-dien-3beta,26-diol-3-O-beta-D-glucopyranosyl-(1 --> 4)-[alpha-l-rhamnopyranosyl (1 --> 2)]-beta-D-galactopyranoside (1) and 26-O-(beta-D-glucopyranosyl)-(25S)-furost-5,20(22)-dien-3beta, 26-diol-3-O-beta-D-glucopyranosyl-(1 --> 4)-[alpha-L-rhamnopyranosyl(1 --> 2)]-beta-D-galactopyranoside (2) by means of spectral and chemical methods.
    Journal of Asian natural products research 01/2009; 11(3):213-8. · 0.61 Impact Factor
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    ABSTRACT: To study the chemical constituents of Davidia involucrata var. vilmoriniana. The chemical constituents were isolated by column chromatography on silical gel and sephadex LH -20. Their structures were elucidated on the basis of spectral analysis and physical constants. Seven compounds were isolated from this plant and the structures of them were identified as 3, 4, 5-trihydroxybenzoic acid (1), ellagic acid (2), maleic acid (3), quercetin (4), quercetin-3-O-beta-D-galactoside (5), 2alpha, 3alpha, 19alpha, 23-tetrahydroxyurs-12-en-28-oic-acid-28-O-beta-D-glucopyranosyl ester (6), ethyl brevifolin carbosylate (7), respectively. Compounds 1-7 were isolated from this plant for the first time.
    Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica 05/2008; 33(7):777-9.
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    ABSTRACT: To study the chemical constituents from the seeds of Allium cepa L., the constituents of the seeds of Allium cepa L. To isolate and purify by silica gel, macroporous resin HP-20, Sephadex LH-20, RP-18 column. Seven compounds were isolated from the EtOH extract of the seeds of Allium cepa., their structures were elucidated by physico-chemical properties and spectroscopic analysis as tianshic acid (I), N-trans-feruloyl tyramine (II), beta-sitosterol-3 beta-glucopyranoside-6'-palmitate (III), sitosterol (IV), daucosterol (V), tryptophane (VI), adenine riboside (VI). Compounds V-VIII are obtained from this plant for the first time, compounds I-IV are isolated from the genus Allium for the first time.
    Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials 03/2008; 31(2):222-3.
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    ABSTRACT: Studies on the whole herb of Urtica dioica L. grown in Nyingchi area, China's Tibet Autonomous Region, resulted in the isolated of nine compounds: beta-sitosterol, trans-ferulic acid, dotriacotane, erucic acid, ursolic acid, scopoletin, rutin, quercetin and p-hydroxylbenzalcohol. Dotriacotane, erucic acid, scopoletin, rutin and p-hydroxylbenzalcohol were obtained from Urtica L. for the first time. Their structures were confirmed by modem spectral analysis (NMR, MS, etc).
    Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials 07/2007; 30(6):662-4.
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    ABSTRACT: To study the chemical constituents of Artemisia rupestris. The chemical constituents were isolated by column chromatography on silica gel, polyamide and Sephadex LH-20. Their structures were elucidated on the basis of spectral analysis. 11 compounds have isolated from this plant, and the structure of them have identified as robinin (1), quercetin (2), linearin (3), luteolin (4), sucrose (5), tilianin (6), luteolin-7-glucoside (7), beta-D-3'-methoxy-4'-O-P-coumaroylglucoside (8), hirsutine (9), 3-(4-methoxy phenyl)-(E)-2-propenoic acid ethyl ester (10), rutin (11). All this compounds have been isolated from this plant for the first time.
    Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica 07/2007; 32(12):1187-9.