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285 Newest Publications in organic letters

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Substituted Quinoline Quinones as Surrogates for the PQQ Cofactor: An Electrochemical and Computational Study

31-Mar-2015 | Walter L. Dorfner; Patrick J. Carroll; Eric J. Schelter, Organic Letters, 2015

Pyrroloquinoline quinones (PQQ) are important cofactors that shuttle redox equivalents in diverse metalloproteins. Quinoline 7,8-quinones have been synthesized and characterized as surrogates for PQQ to elucidate redox energetics within metalloenzyme active sites. The quinoline 7,8-quinones were ...


Counter-Ion-Dependent Alkyne Iminium Ion Cyclization for Divergent Synthesis of N-Fused Indolylidine, Indole, and Indoline Derivatives Promoted by the Lewis/Bronsted Acid

27-Mar-2015 | Santosh J. Gharpure; Yogesh G. Shelke; Dasari Praveen Kumar, Organic Letters, 2015

Organic Letters DOI: 10.1021/acs.orglett.5b00615


Rh(III)-Catalyzed Decarboxylative ortho-Heteroarylation of Aromatic Carboxylic Acids by Using the Carboxylic Acid as a Traceless Directing Group

23-Mar-2015 | Xurong Qin; Denan Sun; Qiulin You; Yangyang Cheng; Jingbo Lan; Jingsong You, Organic Letters, 2015

Organic Letters DOI: 10.1021/acs.orglett.5b00532


Chojalactones A–C, Cytotoxic Butanolides Isolated from Streptomyces sp. Cultivated with Mycolic Acid Containing Bacterium

05-Mar-2015 | Shotaro Hoshino; Toshiyuki Wakimoto; Hiroyasu Onaka; Ikuro Abe, Organic Letters, 2015

The soil-derived bacterium, Streptomyces sp. CJ-5, was cocultured with the mycolic acid-containing bacterium Tsukamurella pulmonis TP-B0596. The combined culture method significantly enhanced the production of the secondary metabolites in Streptomyces sp. CJ-5, leading to the isolation of three ...


Regioselective Synthesis of Substituted Arenes via Aerobic Oxidative [3 + 3] Benzannulation Reactions of α,β-Unsaturated Aldehydes and Ketones

27-Feb-2015 | Prabhakar Ramchandra Joshi; Sridhar Undeela; Doni Dhanoj Reddy; Kiran Kumar Singarapu; Rajeev S. Menon, Organic Letters, 2015

Facile conversion of α,β-unsaturated aldehydes and ketones into highly substituted arenes via a base-mediated, completely regioselective, air-oxidative [3 + 3] benzannulation reaction with readily available 4-sulfonylcrotonates or 1,3-bisphenylsulfonylpropene is reported. The reaction can also be ...


Additive-Free Decarboxylative Coupling of Cinnamic Acid Derivatives in Water: Synthesis of Allyl Amines

23-Feb-2015 | Kyungho Park; Sunwoo Lee, Organic Letters, 2015

Organic Letters DOI: 10.1021/acs.orglett.5b00303


Asymmetric Total Syntheses of Megacerotonic Acid and Shimobashiric Acid A

20-Feb-2015 | Scott W. Krabbe; Jeffrey S. Johnson, Organic Letters, 2015

The asymmetric total syntheses of the α-benzylidene-γ-butyrolactone natural products megacerotonic acid and shimobashiric acid A have been accomplished in nine and 11 steps, respectively, from simple, commercially available starting materials. The key step for each synthesis is the ...


A Novel and Selective Fluoride Opening of Aziridines by XtalFluor-E. Synthesis of Fluorinated Diamino Acid Derivatives

16-Feb-2015 | Melinda Nonn; Loránd Kiss; Matti Haukka; Santos Fustero; Ferenc Fülöp, Organic Letters, 2015

The selective introduction of fluorine onto the skeleton of an aminocyclopentane or cyclohexane carboxylate has been developed through a novel and efficient fluoride opening of an activated aziridine ring with XtalFluor-E. The reaction proceeded through a stereoselective aziridination of the ...


Simple Aza-Conjugate Addition Methodology for the Synthesis of Isoindole Nitrones and 3,4-Dihydroisoquinoline Nitrones

11-Feb-2015 | Lucy R. Peacock; Robert S. L. Chapman; Adam C. Sedgwick; Mary F. Mahon; Dominique Amans; Steven D. Bull, Organic Letters, 2015

Aryl-aldehydes containing ortho-substituted α,β-unsaturated carboxylic acid derivatives react with hydroxylamine to afford reactive N-hydroxy-carbinolamine intermediates that undergo intramolecular aza-conjugate addition reactions to afford isoindole nitrones and 3,4-dihydroisoquinoline nitrones ...


Lewis and Brønsted Acid Induced (3 + 2)-Annulation of Donor–Acceptor Cyclopropanes to Alkynes: Indene Assembly

10-Feb-2015 | Eduard R. Rakhmankulov; Konstantin L. Ivanov; Ekaterina M. Budynina; Olga A. Ivanova; Alexey O. Chagarovskiy; Dmitri ..., Organic Letters, 2015

Organic Letters DOI: 10.1021/ol5037562


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