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中国化学会·第十五届全国有机合成化学学术研讨会

作者： Cong Wang Rui-Hua Liu ming-Qing Tian 胡绪红 teck-Peng Loh Institute of Advanced Synthesis Nanjing Tech University 南京工业大学

Inspired by the extensive versatility of 1,3-dicarbonyl compounds in synthetic chemistry, as well as Snider’s seminal work on intramolecular oxidative addition of α-keto carbon-centered radical into olefins, we designed an efficient transformation for oxidative cross-coupling reactions of α-alkylated styrenes with 1,3-dicarbonyl *** functionalization of olefins with simple coupling partners offers a particularly attractive tool for the rapid construction of highly substituted olefins and analogues. By virtue of atom and step economy, substantial progress has been accomplished on the subject of radical-mediated carbon-carbon bond-forming reactions, which often involve the addition of in situ generated carbon-centered radical intermediates from activated precursors to an *** principle, the strategy for the sp-hybridized carbon-centered radical addition to olefins, mainly relying on the corresponding halides, has been well documented in the past decades, generally resulting in alkylation products by protonolysis(path a) or interception by other radical species to yield difunctionalizations(path b).Another noteworthy pathway is that the intermediate Ⅰ undergoes oxidation to the intermediate Ⅱ following competitive β-H elimination to preferentially generate the thermodynamically controlled vinyl alkylation(path c), whereas reports on the synthesis of the allyl products have not yet been established(path d).

关键词： copper alkyl radicals dicarbonyls,cross-coupling aerobic oxidation

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Highly Stereocontrolled Synthesis of Fluorinated 2,6-trans Dihydropyrans via Prins cyclization

Highly Stereocontrolled Synthesis of Fluorinated 2,6-trans D...

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氟化学与美好生活——中国化学会第十一届全国氟化学会议

作者： teck-Peng Loh Division of Chemistry and Biological Chemistry School of Physical and Mathematical SciencesNanyang Technological University

In this work,we have demonstrated an efficient BF·EtO-promoted Prins cyclization for synthesis of fluorinated 2,6-trans dihydropyrans in moderate to good yields with excellent diastereoselectivities by using allenic alcohols and various aldehydes as *** discovery provides a new method for the synthesis of biologically active fluorinated 2.6-trans pyranyl motifs.

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On-treatment isolated superior ophthalmic vein thrombosis complicated with carotid cavernous fistula: a case report

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International Journal of Ophthalmology(English edition) 2022年第10期15卷 1726-1728页

作者： Yee Lin Lo Kah Wei Ong teck Chee Cheng Wan Haslina Wan Abdul Halim Meng Hsien Yong Department of Ophthalmology Faculty of MedicineUniversiti Kebangsaan MalaysiaKuala Lumpur 56000Malaysia

Dear Editor, We are writing this letter to present a case of ontreatment isolated superior ophthalmic vein thrombosis(SOVT) that progressed to cavernous sinus thrombosis(CST) and further complicated with carotid cavernous fistula(CCF). SOVT is a rare but potentially lethal illness. It is normally presented with orbital congestion syndrome with proptosis, ophthalmoplegia, diplopia, and high intraocular pressure(IOP)[1]. Late detection of this disease can lead to devastating complications such as optic nerve compression。

关键词： such letter complicated

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Stereoelectronic versus Steric Tuning in the Prins Cyclization Reaction:Synthesis of 2,6-trans Pyranyl Motifs

Stereoelectronic versus Steric Tuning in the Prins Cyclizati...

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氟化学与美好生活——中国化学会第十一届全国氟化学会议

作者： teck-Peng Loh Division of Chemistry and Biological Chemistry School of Physical and Mathematical SciencesNanyang Technological University

Previously,we demonstrated that -alkoxy tethered homoallylic alcohol can undergo Prins cyclization with various aldehydes to afford the 2,6-trans tetrahydropyrans, albeit with low selectivity(cisltrans=50/50).We believe that the carbonyl group has stabilized the of the *** forcing the carbonyl group to adopt the axial *** a consequence,it led to the 2,6-trans tetrahydropyrans. We found that removal of the 1.3-diaxialinteraction by using allenic alcohols instead of the homoallylic alcohols may lead to higher 2.6-trans selectivity.

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Ionic Liquid [Bmim][BF4] as an Efficient and Recyclable Reaction Media for the Synthesis of O-Acetylcyanohydrin via a One-pot Condensation of Aldehyde, TMSCN and Ac2O without Lewis Acid or Any Special Activation

Ionic Liquid [Bmim][BF4] as an Efficient and Recyclable Reac...

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中国化学会第四届有机化学学术会议

作者： LOH,teck-Peng Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry and Chemical Engineering Suzhou University Suzhou 215006 China Division of Chemistry and Biological Chemistry Nanyang Technological University Singapore 637616 Singapore

＜正＞O-Protected cyanohydrins serve as versatile synthetic intermediates in organic synthesis. Among several methods for the preparation of O-protected cyanohydrins, one-pot condensation of carbonyl compound, cyanide source and Ac2O catalyzed by Lewis acid or phase transfer catalyst proved to be a simple and effective one. Recently, Sugai and coworkers reported SnBr2 promoted one-pot synthesis of O-acetylcyanohydrin which using

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Asymmetric Allylation of Ketones Catalyzed by Chiral In（Ⅲ）-PYBOX Complex Immobilized in [Hmim]PF6

Asymmetric Allylation of Ketones Catalyzed by Chiral In（Ⅲ...

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中国化学会第四届有机化学学术会议

作者： LOH,teck-Peng Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry and Chemical Engineering Suzhou University Suzhou 215006 China Division of Chemistry and Biological ChemistryNanyang Technological UniversitySingapore 637616Singapore

＜正＞Recently, ionic liquids have attracted extensive interest as excellent alternatives to organic solvents, due to their favourable properties, such as non-flammability, no measurable vapour pressure, low toxicity, reusability, low cost and high thermal stability. Over the past few years, ionic liquids have generated a significant amount of interest. It was reported that the allylation reaction of carbonyl functionality with allytributystannane in ionic liquids

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Enantioselective Addition of Methailyitributyitin to Aldehydes Catalyzed by Chiral In（Ⅲ）-PYBOX Complex

Enantioselective Addition of Methailyitributyitin to Aldehyd...

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中国化学会第四届有机化学学术会议

作者： LOH,teck-Peng Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry and Chemical EngineeringSuzhou UniversitySuzhou 215006China Division of Chemistry and Biological ChemistryNanyang Technological UniversitySingapore 637616Singapore

＜正＞The synthesis of enantiomerically enriched homoallylic alcohols is an important goal in organic synthesis. This is because homoallylic alcohols are versatile intermediates which can be converted to a wide variety of synthetically useful compounds. Therefore, there has been intense research activity in this area in recent years, leading to the development of a large and diverse array of chiral catalysts, especially chiral Lewis acid-catalyzed addition of the allyl transfer reagents to carbonyl functionality.

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Biomimetic Cationic Polyene cyclization

Biomimetic Cationic Polyene cyclization

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中国化学会第28届学术年会

作者： teck-Peng Loh Department of Chemistry University of Science and Technology of China Division of Chemistry and Biological Chemistry School of Physical and Mathematical SciencesNanyang Technological University

＜正＞The biosynthetic cationic polyene cyclizations of acyclic precursors squalene and（3S）-2,3-oxidosqualene lead to a vast array of known tricyclic,tetracyclic and pentacyclic natural products.2 In particular,lanosterol is biosynthesized in a single,economical and effective step from （3S）-2,3-oxidosqualene by a single 83-kDa *** impressive part about this reaction is the ability

关键词： polyene acetal-initiated natural products aqueous media high enantioselectivies

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Rencent Progress In The Total Synthesis Of Natural Products

Rencent Progress In The Total Synthesis Of Natural Products

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中国化学会第九届全国有机化学学术会议

作者： teck-Peng Loh Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Department of Chemistry University of Science and Technology of China

＜正＞One of the objectives in our group is to search for new synthetic methods and concepts through the total synthesis of natural *** this presentation,I will go through some of the methodologies and concepts develo...

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Copper Catalyzed Highly Regioselective Silylcupration of Terminal Alkynes to Form α-Vinylsilanes

Copper Catalyzed Highly Regioselective Silylcupration of Ter...

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氟化学与美好生活——中国化学会第十一届全国氟化学会议

作者： teck-Peng Loh Division of Chemistry and Biological Chemistry School of Physical and Mathematical SciencesNanyang Technological University

＜正＞A highly regioselective synthesis of branched vinylsilanes through silicon-copper additions to terminal alkynes catalyzed by copper（Ⅰ）was developed using methanol as *** corresponding vinylsilanes were obtain...

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