Hamuramicins A and B, 22-membered macrolides, produced by an endophytic actinomycete Allostreptomyces sp. K12-0794
- T. Suga, Tōru Kimura, T. Nakashima
- ChemistryJournal of antibiotics (Tokyo. )
- 1 July 2018
Two new compounds, designated as hamuramicins A (1) and B (2), were isolated from the cultured broth of an endophytic actinomycete Allostreptomyces sp. K12-0794 by silica gel column chromatography…
Aryl urea derivatives of spiropiperidines as NPY Y5 receptor antagonists.
- Toshiyuki Takahashi, Y. Haga, T. Fukami
- Biology, ChemistryBioorganic & Medicinal Chemistry Letters
- 1 July 2009
Direct Carboxylation of Simple Arenes with CO2 Through a Rhodium‐Catalyzed C—H Bond Activation.
- T. Suga, H. Mizuno, J. Takaya, N. Iwasawa
- Chemistry
- 1 March 2015
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Direct carboxylation of simple arenes with CO₂ through a rhodium-catalyzed C-H bond activation.
- T. Suga, H. Mizuno, J. Takaya, N. Iwasawa
- ChemistryChemical Communications
- 23 October 2014
Various arenes such as benzene, toluene, xylene, electron-rich or electron-deficient benzene derivatives, and heteroaromatics are directly carboxylated with high TONs.
Platinum(II)-catalyzed generation and [3+2] cycloaddition reaction of α,β-unsaturated carbene complex intermediates for the preparation of polycyclic compounds.
- Kodai Saito, Hideyuki Sogou, T. Suga, H. Kusama, N. Iwasawa
- ChemistryJournal of the American Chemical Society
- 2 February 2011
Pt(II)-catalyzed generation of unsaturated carbene complex intermediates from various propargyl ether derivatives based on electrophilic activation of alkynes was realized, leading to efficient formation of indoles, naphthols, and benzofuran fused with a five-membered ring in high yields.
Nickel-Catalyzed Cross-Electrophile Coupling between Benzyl Alcohols and Aryl Halides Assisted by Titanium Co-reductant.
The treatment of a benzyl alcohol and aryl halide with a nickel catalyst and low-valent titanium reagent generated from TiCl4(lutidine) and manganese powder afforded the cross-coupled product in high yield.
Thermal decomposition of acrylamide from polyacrylamide
- Y. Kitahara, K. Okuyama, Keita Ozawa, T. Suga, Seiji Takahashi, T. Fujii
- ChemistryJournal of Thermal Analysis and Calorimetry
- 25 July 2012
Ion-attachment mass spectrometry with a temperature-programed direct probe allows the detection of intact pyrolysis products. It, therefore, offers the opportunity to monitor directly thermal…
Low-Valent Titanium-Mediated Radical Conjugate Addition Using Benzyl Alcohols as Benzyl Radical Sources.
- T. Suga, Sho Shimazu, Y. Ukaji
- ChemistryOrganic Letters
- 27 August 2018
A concise method to directly generate benzyl radicals from benzyl alcohol derivatives has been developed using a simple and inexpensive combination of TiCl4(collidine) and manganese powder, which facilitated homolytic cleavage of benzylic C-OH bonds.
Formal Total Synthesis of Manzacidin C Based on Asymmetric 1,3-Dipolar Cycloaddition of Azomethine Imines.
- Thu Minh Thi Tong, T. Soeta, T. Suga, K. Kawamoto, Y. Hayashi, Y. Ukaji
- ChemistryJournal of Organic Chemistry
- 27 January 2017
An enantioselective formal total synthesis of (+)-manzacidin C is described, which construction of two chiral centers via the asymmetric 1,3-dipolar cycloaddition of an azomethine imine to methallyl alcohol by the use of (S,S)-DIPT as a chiral auxiliary.
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