Search Results - "Tsubouchi, Akira"

Copper(I)-Catalyzed Alkylation of Aryl- and Alkenylsilanes Activated by Intramolecular Coordination of an Alkoxide by Tsubouchi, Akira, Muramatsu, Daisuke, Takeda, Takeshi

“…Let's coordinate: Copper(I)‐catalyzed cross‐coupling of alkenyl‐ and arylsilanes with primary alkyl iodides as well as allylic and benzylic halides as C(sp3)X…”
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Chiroptical Inversion of Europium(III) Complexes by Changing a Remote Stereogenic Center of a C2 -Symmetric Bispyrrolidinoindoline Manifold by Taniguchi, Tomoaki, Tsubouchi, Akira, Imai, Yuki, Yuasa, Junpei, Oguri, Hiroki

“…As an effort to integrate natural products chemistry and coordination chemistry, a diastereomeric pair of chiral alkaloidal manifolds composed of a…”
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Zn(OTf) 2 -mediated annulations of N -propargylated tetrahydrocarbolines: divergent synthesis of four distinct alkaloidal scaffolds by Yorimoto, Sadaiwa, Tsubouchi, Akira, Mizoguchi, Haruki, Oikawa, Hideaki, Tsunekawa, Yoshiaki, Ichino, Tomoya, Maeda, Satoshi, Oguri, Hiroki

“…Intramolecular hydroarylations of -propargylated tetrahydrocarbolines were efficiently mediated using a unique combination of Zn(OTf) with -BuOH under neutral…”
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Diversity oriented synthesis of conjugate dienes and alkenylcyclopropanes utilizing silyl group-substituted titanium carbene complexes as bimetallic synthetic reagents by Takeda, Takeshi, Mori, Ayako, Fujii, Tomoya, Tsubouchi, Akira

“…Diversity oriented synthesis of conjugate dienes and alkenylcyclopropanes by the sequential reactions using silyl group-substituted titanium carbene complexes…”
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Complete Regio- and Stereoselective Construction of Highly Substituted Silyl Enol Ethers by Three-Component Coupling by Tsubouchi, Akira, Enatsu, Shouko, Kanno, Ryo, Takeda, Takeshi

“…Three components for total control: Trisubstituted silyl enol ethers were prepared by three‐component coupling of α‐silyl α,β‐unsaturated ketones, organocopper…”
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Cross-coupling between Aryl- and Alkenyldimethylsilanes and Organic Halides Promoted by a Copper(I) Iodide/Sodium Hydride/Ethylene Glycol System by Takeda, Takeshi, Takeda, Yuichiro, Tsubouchi, Akira

“…A copper(I) iodide/sodium hydride/ethylene glycol system promoted reaction of aryl- and alkenyldimethylsilanes with C(sp3)–X electrophiles bearing a β-hydrogen…”
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Regio- and stereoselective preparation of highly substituted tertiary homoallylic alcohols by Takeda, Takeshi, Wasa, Hideki, Tsubouchi, Akira

“…The titanocene(II)-promoted reaction of α-(benzyldimethylsilyl)allylic sulfides with ketones proceeded with high regio- and stereoselectivity to give…”
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Copper(I)-Promoted Alkylation of Alkenylbenzyldimethylsilanes by Takeda, Takeshi, Matsumura, Ryo, Wasa, Hideki, Tsubouchi, Akira

“…Palladium‐catalyzed cross‐coupling of acid‐ and base‐unstable heteroatom‐functionalized organosilanes and C(sp2)X electrophiles such as aryl and alkenyl…”
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Highly Diastereoselective Addition of Allyltitanocenes to Ketones by Yatsumonji, Yasutaka, Nishimura, Takuya, Tsubouchi, Akira, Noguchi, Keiichi, Takeda, Takeshi

“…A route with less congestion: A practical method for the highly diastereoselective preparation of anti tertiary homoallylic alcohols has been developed. The…”
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Silyl Migration in Conjunction with Substitution on Silicon in Copper(I) t-Butoxide-promoted Coupling between o-Silylphenyl Ketones and Organic Halides by Tsubouchi, Akira, Matsuda, Hiroko, Kira, Takashiro, Takeda, Takeshi

“…(Z)-Di-t-butoxymethylsilyl enol ethers were stereoselectively produced by the copper(I) t-butoxide-promoted cross-coupling of o-(dimethylphenylsilyl)phenyl…”
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Diastereoselective Addition of Allyltitanocenes to Cyclic Enones by Takeda, Takeshi, Nishimura, Takuya, Yoshida, Satoshi, Saiki, Fumiya, Tajima, Yuki, Tsubouchi, Akira

“…The reaction of allyltitanocenes with five- to seven-membered cyclic enones proceeded with good to high diastereoselectivity depending on the ring size of…”
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Titanocene(II)-Promoted, One-Pot, Three-Component Coupling of Thioacetals, Alkynyl Sulfones, and Carbonyl Compounds:  Highly Stereoselective Formation of tert-Homopropargyl Alcohols by Takeda, Takeshi, Ando, Maiko, Sugita, Takenori, Tsubouchi, Akira

“…Titanocene alkylidene complexes, generated by desulfurizative titanation of thioacetals with Cp2Ti[P(OEt)3]2, reacted with alkynyl methyl sulfones to produce…”
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Stereoselective formation of phenylthio groups substituted 1-metalla-3-titanacyclobutanes by Oishi, Shigeki, Tsubouchi, Akira, Takeda, Takeshi

“…Desulfurizative titanation of group 14 metal compounds bearing two or four bis(phenylthio)methyl groups with the low-valent titanium reagent Cp 2Ti[P(OEt) 3] 2…”
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Titanocene(II)-Promoted Multicomponent Reactions Utilizing Alkynyl Sulfones, Alkenyl Sulfones, and Carbonyl Compounds: A Novel Method for the Synthesis of Vinylallenes by Ogata, Akitoshi, Nemoto, Masami, Kobayashi, Kenji, Tsubouchi, Akira, Takeda, Takeshi

“…Titanocene(II)‐promoted cross coupling of alkynyl‐ and (Z)‐alkenyl sulfones affords α‐(phenylsulfonyl)alkenyltitanium species. Further treatment of these…”
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Copper(I)-Catalyzed Alkylation of Aryl- and Alkenylsilanes Activated by Intramolecular Coordination of an Alkoxide by Tsubouchi, Akira, Muramatsu, Daisuke, Takeda, Takeshi

“…Koordination ist gefragt: Die Titelreaktion mit primären Alkyliodiden oder Allyl/Benzylhalogeniden als elektrophile Kupplungspartner C(sp3)‐X gelingt durch…”
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Highly Stereoselective Construction of Multiple Stereogenic Centers Using Allylic Sulfides by Takeda, Takeshi, Yatsumonji, Yasutaka, Nishimura, Takuya, Sugita, Takenori, Tsubouchi, Akira

“…A new methodology for the construction of multiple stereogenic centers by the reaction of ketones with allyltitanium reagents generated by the reductive…”
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Regio- and stereoselective preparation of dienylcarboxylic acids and dienylphosphonic esters using a ( Z)-alkenyl sulfone–titanocene(II) system by Ogata, Akitoshi, Nemoto, Masami, Takano, Yoshitaka, Tsubouchi, Akira, Takeda, Takeshi

“…Titanocene(II)-promoted alkenylation of functionalized alkynes with ( Z)-alkenyl sulfones proceeded with high regio- and stereoselectivity to produce…”
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Fluorocyclization of 2‐Alkynylbenzoates: Synthesis of Fluorinated Isocoumarins by N‐Fluoropyridinium Salts by Sakagami, Haruki, Tsubouchi, Akira, Saito, Akio

“…Herein, we describe metal‐free fluorocyclization of 2‐alkynylbenzoates by N‐fluoropyridinium salts. The present method allows the selective synthesis of…”
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Stereoselective Preparation of 1-Siloxy-1-alkenylcopper Species by 1,2-Csp2-to-O Silyl Migration of Acylsilanes by Tsubouchi, Akira, Onishi, Kotaro, Takeda, Takeshi

“…1-Siloxy-1-alkenylcopper species were generated by 1,2-Csp2-to-O silyl migration of the copper enolates of acyltriphenylsilanes. The alkenylcopper species…”
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Synthesis of 4-fluoroisocoumarins by copper-catalyzed annulation of 2-halobenzoic acids and 2-fluoro-1,3-diketones by Sakagami, Haruki, Tsubouchi, Akira, Saito, Akio

“…•This study provides one of the few synthetic methods of fluorinated isocoumarins.•This reaction can proceed with an inexpensive copper catalyst and readily…”
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