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Autor:
Takeshi Fujita, Ryutaro Morioka, Tanner C. Jankins, Masahiro Hattori, Masahiro Ikeda, Masaaki Matsuda, Junji Ichikawa
Publikováno v:
Tetrahedron. 75(1):36-46
Ketones and imines bearing a 2-(trifluoromethyl)allylic moiety successfully underwent nucleophilic 5-endo-trig cyclization via their metal enolates and enamides. O- or N-Cyclization proceeded exclusively in each case to afford the corresponding five-
Publikováno v:
Tetrahedron. 74(45):6512-6519
exo-Glycals are both valuable synthetic tools and biologically relevant structures. This article reviews the novel synthetic approaches that have been reported to synthesize sugar based tri- or tetrasubstituted exocyclic enol ethers. Among those, the
Autor:
Shuhei Eguchi, Takaya Sakaguchi, Yuki Katsuragi, Akihiro Ando, Masahiko Hayashi, Ryosuke Matsubara
Publikováno v:
Tetrahedron. 74(27):3642-3651
Furoxans are distinctive heteroaromatic compounds in that they are potentially capable of releasing nitric oxide under physiological conditions. In order to utilize the furoxan scaffold for the development of functional molecules, synthetically relev
Publikováno v:
Tetrahedron. 73(42):6052-6056
We describe the synthesis of a mesoion-derived nitroso compound, 5-nitroso-1,3-diphenyltetrazolium tetrafluoroborate (1), and its application in the oxidation of alcohols. The structure of 1 was fully characterized by X-ray analysis, showing that it
Autor:
Jumpei Horiuchi, Hiroshi Nagase, Hidetoshi Kawai, Kotaro Tateno, Naoshi Yamamoto, Yasuyuki Nagumo, Noriki Kutsumura, Tsuyoshi Saitoh, Ryuichiro Ohshita
Publikováno v:
Tetrahedron. 73(34):5214-5219
The synthesis of novel adamantane-like cage compounds consisting of phosphorus, sulfur, and carbon atoms was developed. We examined the reaction of a variety of acetophenone derivatives with P4S10 in refluxing benzene. A novel noradamantane-like cage
Publikováno v:
Tetrahedron. 91:132191
Highly sterically hindered N-heterocyclic carbenes (NHCs), can be readily prepared from the corresponding anilines, and serve as organocatalysts in NHC-catalyzed homoenolate cross-annulation of α,β-enals and aryl aldehydes. This catalysis enables t
Autor:
Tsubasa Inokuma, Kiyosei Takasu, Ken-ichi Yamada, Masayuki Sugano, Yousuke Yamaoka, Shinichi Fujiwara
Publikováno v:
Tetrahedron. 91:132220
Density-functional theory (DFT) calculations provided a new model to rationalize the stereoselectivity in the asymmetric addition to alkylidenemalonate bearing 8-phenylmenthyl groups as a chiral auxiliary. The diastereoselectivity in the addition rea
Autor:
Mitsuo Toda, Naoharu Watanabe, Kohei Sato, Hiroki Yamashita, György Marosi, Tetsuo Narumi, Péter L. Sóti, Nobuyuki Mase
Publikováno v:
Tetrahedron. 72(16):1984-1990
The self-assembling gold nanoparticle (GNP)-supported l -proline derivative, which was readily synthesized in four steps from 4-hydroxy- l -proline and chloroauric acid, was used for enamine-based aldol reactions. The modified Brust-Schiffrin (BS) sy
Autor:
María López-Iglesias, Alicia Arizpe, Carlos Cativiela, Francisco J. Sayago, Vicente Gotor, Vicente Gotor-Fernández
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
Scopus
RUO. Repositorio Institucional de la Universidad de Oviedo
instname
Scopus
RUO. Repositorio Institucional de la Universidad de Oviedo
A simple dynamic kinetic resolution of dimethyl (1,3-dihydro-2H-isoindol-1-yl)phosphonate has been developed by means of a lipase-catalyzed alkoxycarbonylation reaction. The influence of reaction parameters such as solvent, type and amount of alkoxyc
Autor:
Raphaël Schneider, Rafik Omar-Amrani, Yves Fort, Benoît Champagne, Jacques Lambert, Christophe Desmarets, Alain Walcarius
Publikováno v:
Tetrahedron
Tetrahedron, Elsevier, 2008, 64 (2), pp.372-381. ⟨10.1016/j.tet.2007.10.091⟩
Tetrahedron, Elsevier, 2008, 64 (2), pp.372-381. ⟨10.1016/j.tet.2007.10.091⟩
International audience; Stable Pd(0) nanoparticles were prepared at room temperature in 1,4-dioxane from PdCl2 using N,N′-bis(4-methoxyphenyl)-(1,1′-binaphthyl)-4,4′-diamine (naphthidine) as reducing and stabilizing agent. This procedure result