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N. F. Thomas · SciRah

Researcher profile · Semantic Scholar

N. F. Thomas

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N. F. Thomas — researcher profile on SciRah

h-index: 19
Works: 75
Citations: 903

Most-cited papers

Cytotoxic Constituents from the Rhizomes of Curcuma zedoaria
Omer Abdalla Ahmed Hamdi, Syarifah Nur Syed Abdul Rahman, K. Awang, Norhanom Abdul Wahab +3 more
2014TheScientificWorldJournal60 citations Open access
Semantic Scholar
Rhazinilam-Leuconolam-Leuconoxine Alkaloids from Leuconotis griffithii.
Chew-Yan Gan, Yun-Yee Low, N. F. Thomas, Toh-Seok Kam
2013Journal of Natural Products58 citations
Semantic Scholar
Synthesis, Characterization and Antifungal Evaluation of 5-Substituted-4-Amino-1,2,4-Triazole-3-Thioesters
Aurangzeb Hasan, N. F. Thomas, Shelly Gapil
2011Molecules44 citations Open access
Semantic Scholar
Unusual indole alkaloid-pyrrole, -pyrone, and -carbamic acid adducts from Alstonia angustifolia.
Shin-Jowl Tan, Y. Choo, N. F. Thomas, W. Robinson +2 more
201039 citations
Semantic Scholar
Transformations of the 2,7-Seco Aspidosperma alkaloid leuconolam, structure revision of epi-leuconolam, and partial syntheses of leuconoxine and leuconodines A and F.
Yun-Yee Low, Fong-Jiao Hong, Kuan-Hon Lim, N. F. Thomas +1 more
2014Journal of Natural Products35 citations
Semantic Scholar
Strategies and Methods for the Syntheses of Natural Oligomeric Stilbenoids and Analogues
S. Velu, N. F. Thomas, J. Weber
201235 citations
Semantic Scholar
Voatinggine and tabertinggine, pentacyclic indole alkaloids derived from an iboga precursor via a common cleavamine-type intermediate.
Choy-Eng Nge, Chew-Yan Gan, Yun-Yee Low, N. F. Thomas +1 more
2013Organic Letters33 citations
Semantic Scholar
A Hexacyclic, Iboga-Derived Monoterpenoid Indole with a Contracted Tetrahydroazepine C-Ring and Incorporation of an Isoxazolidine Moiety, a Seco-Corynanthean, an Aspidosperma-Aspidosperma Bisindole with Anticancer Properties, and the Absolute Configuration of the Pyridopyrimidine Indole Alkaloid, Ve
Choy-Eng Nge, K. Sim, Siew-Huah Lim, N. F. Thomas +2 more
2016Journal of Natural Products31 citations
Semantic Scholar
Hyaluronidase Inhibitory Activity of Pentacylic Triterpenoids from Prismatomeris tetrandra (Roxb.) K. Schum: Isolation, Synthesis and QSAR Study
N. Abdullah, N. F. Thomas, Y. Sivasothy, V. Lee +3 more
2016International Journal of Molecular Sciences29 citations Open access
Semantic Scholar
Biomimetic oxidative dimerization of anodically generated stilbene radical cations: effect of aromatic substitution on product distribution and reaction pathways.
Fong-Jiao Hong, Yun-Yee Low, Kam-Weng Chong, N. F. Thomas +1 more
2014Journal of Organic Chemistry28 citations
Semantic Scholar
Vobatensines A-F, Cytotoxic Iboga-Vobasine Bisindoles from Tabernaemontana corymbosa.
Dawn Su-Yin Sim, W. Teoh, K. Sim, Siew-Huah Lim +3 more
2016Journal of Natural Products27 citations
Semantic Scholar
Recent advances in the discovery and development of stilbenes and lactones in anticancer therapy
S. Inayat-Hussain, N. F. Thomas
200426 citations
Semantic Scholar
Heimiol A, a new dimeric stilbenoid from Neobalanocarpus heimii
J. Weber, I. Wahab, A. Marzuki, N. F. Thomas +6 more
200123 citations
Semantic Scholar
Perhentidines A-C: macroline-macroline bisindoles from Alstonia and the absolute configuration of perhentinine and macralstonine.
Siew-Huah Lim, Yun-Yee Low, Shin-Jowl Tan, Kuan-Hon Lim +2 more
2012Journal of Natural Products22 citations
Semantic Scholar
Seco-tabersonine alkaloids from Tabernaemontana corymbosa.
Kuan-Hon Lim, N. F. Thomas, Z. Abdullah, Toh-Seok Kam
2009Phytochemistry22 citations
Semantic Scholar
Indolenine meso-substituted dibenzotetraaza[14]annulene and its coordination chemistry toward the transition metal ions Mn(III), Fe(III), Co(II), Ni(II), Cu(II), and Pd(II).
Hamid Khaledi, M. Olmstead, H. Ali, N. F. Thomas
2013Inorganic Chemistry21 citations
Semantic Scholar
A Tandem Horner-Emmons Olefination-Conjugate Addition Approach to the Synthesis of 1,5-Disubstituted-6-azabicyclo[3.2.1]octanes Based on the AE Ring Structure of the Norditerpenoid Alkaloid Methyllycaconitine.
David J. Callis, N. F. Thomas, D. Pearson, B. V. Potter
1996Journal of Organic Chemistry21 citations
Semantic Scholar
Tandem pericyclic reactions in a new FeCl3-promoted synthesis of catechol analogues of restrytisol C
N. F. Thomas, K. C. Lee, Thomas Paraidathathu, J. Weber +3 more
200220 citations
Semantic Scholar
A tandem highly stereoselective FeCl3-promoted synthesis of a bisindoline: synthetic utility of radical cations in heterocyclic construction
N. F. Thomas, S. Velu, J. Weber, K. C. Lee +5 more
200419 citations
Semantic Scholar
3,5-dibenzyloxy-4'-hydroxystilbene induces early caspase-9 activation during apoptosis in human K562 chronic myelogenous leukemia cells.
H. Roslie, Kok-Meng Chan, N. Rajab, S. Velu +7 more
2012Journal of Toxicological Sciences18 citations Open access
Semantic Scholar
A FeCl3-promoted highly atropodiastereoselective cascade reaction: synthetic utility of radical cations in indolostilbene construction
K. Ahmad, N. F. Thomas, M. Mukhtar, Ibrahim Noorbatcha +8 more
200918 citations
Semantic Scholar
Resveratrol analogue, (E)-N-(2-(4-methoxystyryl) phenyl) furan-2-carboxamide induces G2/M cell cycle arrest through the activation of p53–p21CIP1/WAF1 in human colorectal HCT116 cells
F. Cheah, K. H. Leong, N. F. Thomas, H. Chin +2 more
2018Apoptosis17 citations
Semantic Scholar
Challenges associated with the synthesis of unusual o-carboxamido stilbenes by the Heck protocol: Intriguing substituent effects, their toxicological and chemopreventive implications.
H. Chin, A. Ariffin, K. Awang, K. Takeya +9 more
2010Organic and biomolecular chemistry16 citations Open access
Semantic Scholar
Grandine A, a New Proaporphine Alkaloid from the Bark of Phoebe grandis
M. Mukhtar, A. Aziz, N. F. Thomas, A. Hadi +2 more
2009Molecules15 citations Open access
Semantic Scholar
Oppositinines A and B: new vasorelaxant beta-carboline alkaloids from Neisosperma oppositifolia.
K. Ahmad, N. F. Thomas, A. Hadi, M. Mukhtar +7 more
2010Chemical and pharmaceutical bulletin14 citations Open access
Semantic Scholar
Manganese triacetate oxidative lactonisation of electron-rich stilbenes possessing catechol and resorcinol substitution (resveratrol analogues)
N. F. Thomas, K. C. Lee, Thomas Paraidathathu, J. Weber +1 more
200213 citations
Semantic Scholar
Electrochemically Mediated Oxidative Transformations of Substituted 4-Methoxystilbenes: Effect of Ortho-Substituted Nucleophilic Groups.
Kam-Weng Chong, Fong-Jiao Hong, N. F. Thomas, Yun-Yee Low +1 more
2017Journal of Organic Chemistry12 citations
Semantic Scholar
Lumusidines A-D and villalstonidine F, macroline-macroline and macroline-pleiocarpamine bisindole alkaloids from Alstonia macrophylla.
Siew-Huah Lim, Yun-Yee Low, G. Subramaniam, Z. Abdullah +2 more
2013Phytochemistry12 citations
Semantic Scholar
3',4'-dihydronorstephasubine, a new bisbenzylisoquinoline from the bark of Alseodaphne corneri
M. Mukhtar, Azeana Zahari, M. Nafiah, A. Hadi +5 more
200911 citations Open access
Semantic Scholar
Natural diterpene pyrones: chemistry and biology.
A. A. Q. Al-Khdhairawi, G. Cordell, N. F. Thomas, Narendra Babu Shivanagere Nagojappa +1 more
2019Organic and biomolecular chemistry10 citations
Semantic Scholar
Expedient syntheses of inososes from carbohydrates: conformational and stereoelectronic aspects of the Ferrier reaction
A. Machado, D. Dubreuil, J. Cleophax, S. Gero +1 more
199210 citations
Semantic Scholar
α'-oxoperakensimines A-C, new bisbenzylisoquinoline alkaloids from Alseodaphne perakensis (Gamble) Kosterm
M. Mukhtar, M. Nafiah, K. Awang, N. F. Thomas +4 more
20099 citations Open access
Semantic Scholar
The subtle co-catalytic intervention of benzophenone in radical cation mediated cyclization - an improved synthesis of 2-3',4'-dimethoxyphenyl) indoline
N. F. Thomas, C. Kee, A. Ariffin, K. Awang +4 more
20089 citations Open access
Semantic Scholar
Synthesis of [4-2H2]-, (4R)[4-2H1]- and (4S)[4-2H1]- 4-(methylnitrosamino)-1-(3'-pyridyl)-1-butanone, c-4 deuteriated isotopomers of the procarcinogen nnk
T. Pathak, N. F. Thomas, M. Akhtar, D. Gani
19909 citations
Semantic Scholar
Treasures old and new: what we can learn regarding the macrocyclic problem from past and present efforts in natural product total synthesis
M. Alehashem, Azhar Bin Ariffin, P. Savage, Wageeh Abdulhadi Yehya Dabdawb +1 more
2020RSC Advances7 citations Open access
Semantic Scholar
Structure Elucidation of the spiro-Polyketide Svalbardine B from the Arctic Fungal Endophyte Poaceicola sp. E1PB with Support from Extensive ESI-MSn Interpretation.
F. B. M. Hussain, A. A. Q. Al-Khdhairawi, Hong-Kok Sing, Anis Low Muhammad Low +5 more
2020Journal of Natural Products7 citations Open access
Semantic Scholar
Cytoprotective effects of (E)-N-(2-(3, 5-dimethoxystyryl) phenyl) furan-2-carboxamide (BK3C231) against 4-nitroquinoline 1-oxide-induced damage in CCD-18Co human colon fibroblast cells
Huan-Huan Tan, N. F. Thomas, S. Inayat-Hussain, K. Chan
2019bioRxiv7 citations Open access
Semantic Scholar
The radical cation mediated cleavage of catharanthine leading to the vinblastine type alkaloids: implications for total synthesis and drug design
M. Alehashem, Chuan-Gee Lim, N. F. Thomas
20167 citations
Semantic Scholar
3′,4′‐Dihydronorstephasubine, a New Bisbenzylisoquinoline from the Bark of Alseodaphne corneri.
M. Mukhtar, Azeana Zahari, M. Nafiah, A. Hadi +5 more
20107 citations
Semantic Scholar
Dunaliine A, a new amino diketone from Desmos dunalii (Annonaceae)
Khalijah Awang, Zunoliza Abdullah, M. Mukhtar, M. Litaudon +3 more
2009Natural Product Research7 citations
Semantic Scholar
New Indole Alkaloids from Kopsia Singapurensis (RIDL.)
K. Ahmad, Y. Hirasawa, A. E. Nugroho, A. Hadi +6 more
20136 citations Open access
Semantic Scholar
Cyclization vs. Cyclization/Dimerization in o-Amidostilbene Radical Cation Cascade Reactions: The Amide Question
H. Chin, A. Ariffin, K. Awang, I. Noorbatcha +4 more
2011Molecules6 citations Open access
Semantic Scholar
(E)-N-(2-(3, 5-Dimethoxystyryl) phenyl) furan-2-carboxamide (BK3C231) induces cytoprotection in CCD18-Co human colon fibroblast cells through Nrf2/ARE pathway activation
Huan-Huan Tan, N. F. Thomas, S. Inayat-Hussain, Kok-Meng Chan
2021Scientific Reports5 citations Open access
Semantic Scholar
Transformations of Ferric Chloride-Generated Stilbene Cation Radicals. The Effect of Aromatic Substitution and a Comparison with Anodic Oxidation.
Fong-Jiao Hong, Kam-Weng Chong, Yun-Yee Low, N. F. Thomas +1 more
2015Chemistry - An Asian Journal5 citations
Semantic Scholar
Reactions of 2-(Diformylmethylidene)-3,3-dimethylindole with hydrazides: synthesis of new pyrazolylindolenine derivatives-the unprecedented one-pot pyrazole-thiadiazole double annulation
Hamid Khaledi, H. Ali, N. F. Thomas, S. Ng
20115 citations
Semantic Scholar
The first report of the reaction of Davy’s reagent with [CpMo(CO)n]2 (n = 2,3) via a phosphorus–sulfur bond cleavage process. Isolation and characterization of CpMo(CO)2(S2P(SPhMe)2), Cp2Mo2(CO)5(S2P(SPhMe)) and Cp2Mo2(μ-S)(μ-S2)(μ-SPhMe) (Cp = (η5-C5H5))
R. Wong, Mei Lee Ooi, S. Ng, N. F. Thomas
20105 citations
Semantic Scholar
Frontiers in Natural Product Chemistry
Atta-ur-rahman, M. Choudhary, K. Khan, T. Hayashi +75 more
20095 citations Open access
Semantic Scholar
Singaporentine A: A New Indole Alkaloid from Kopsia singapurensis Ridl.
K. Awang, K. Ahmad, N. F. Thomas, Y. Hirasawa +4 more
20085 citations Open access
Semantic Scholar
Unusual Nitrogenous Derivatives from Alstonia
Shin-Jowl Tan, G. Subramaniam, N. F. Thomas, Toh-Seok Kam
2012Natural Product Communications4 citations Open access
Semantic Scholar
Heimiol A, a New Dimeric Stilbenoid from Neobalanocarpus heimii.
J. Weber, I. Wahab, A. Marzuki, N. F. Thomas +6 more
20014 citations
Semantic Scholar

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