34 results on '"Urabe, Hirokazu"'
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2. Aldehyde addition and copper-mediated allylation of bicyclic alkoxytitanacyclopentenes and -pentadienes: new selectivities and an unusual reaction
3. Ti(II)-mediated allenyne cyclization as a new tool for generation of chiral organotitanium compounds. Asymmetric generation of cyclic allyltitanium reagents with no chiral auxiliary
4. Intramolecular cylization of 2,7- or 2,8-bis-unsaturated esters mediated by (eta2-propene)Ti(O-i-Pr)2. Facile construction of mono- and bicyclic skeletons with stereoselective introduction of a side chain. A synthesis of d-sabinene
5. Rh-Catalyzed isomerization and intramolecular redox reaction of alkynyl ethers affording dihydropyrans and ketoolefins
6. Yttrium-mediated conversion of vinyl Grignard reagent to a 1,2-dimetalated ethane and its synthetic application
7. Copper-catalyzed 1,2-double amination of 1-halo-1-alkynes. Concise synthesis of protected tetrahydropyrazines and related heterocyclic compounds
8. Air-assisted addition of Grignard reagents to olefins. A simple protocol for a three-component coupling process yielding alcohols
9. Intramolecular Cyclization of 2,7-or 2,8-Bis-Unsaturated Esters Mediated by (η┣D12┫D1-Propene)Ti(O-i-Pr)┣D22┫D2. Facile Construction of Mono-and Bicyclic Skeletons with Stereoselective Introduction of a Side Chain. A Synthesis of d-Sabinene
10. Titanium Alkoxide-Based Method for Stereoselective Synthesis of Functionalized Conjugated Dienes
11. Titanium alkoxide complex of functionalized conjugated dienes. A versatile bis-anionic template for stereoselective construction of carbon frameworks
12. Enol ester as an olefinic partner in Enyne cyclization. A novel tandem cyclization to stereodefined bicyclo[3.3.0]octenes
13. Selective preparation of benzyltitanium compounds by the metalative Reppe reaction. Its application to the first synthesis of alcyopterosin A
14. Selective syntheses of metalated pyridines from two different unsymmetrical acetylenes, a nitrile, and a titanium(II) alkoxide
15. Remarkably facile, unidirectional isomerization of titanted vinylallenes to cyclobutenyltitanium compounds. A practical construction of cyclobutene framework
16. Metalativ Reppe reaction. Organized assembly of acetylene molecules on titanium template leading to a new style of acetylene cyclotrimerization
17. Expedient construction of multiple stereogenic centers in an acyclic system via the addition of aldehydes, ketones and chiral imines to an enyne-titanium alkoxide complex
18. One-pot, yet two-step, hydrotitanation of 1-silyl- or 1-stannyl-1-alkynes, showing the opposite regioselectivity to the routine hydrometalations
19. Copper-Catalyzed 1,2-Double Amination of 1-Halo-alkynes. Concise Synthesis of Protected Tetrahydropyrazines and Related Heterocyclic Compounds
20. A novel tandem cyclization of 2,7- or 2,8-bis-unsaturated esters mediated by (eta(super 2)-propene)TiX2 (X = Cl or O-i-Pr). A facile construction of bicyclo[3.3.0]octane,-[4.3.0]nonane, and -[3.1.0]hexane skeletons
21. Palladium-catalyzed alkylative cyclization of 1,6- and 1,7-enynes
22. Metalative Reppe Reaction. Organized Assembly of Acetylene Molecules on Titanium Template Leading to a New Style of Acetylene Cyclotrimerization
23. Remarkably Facile, Unidirectional Isomerization of Titanated Vinylallenes to Cyclobutenyltitanium Compounds. A Practical Construction of a Cyclobutene Framework
24. Expedient Construction of Multiple Stereogenic Centers in an Acyclic System via the Addition of Aldehydes, Ketones, and Chiral Imines to an Enyne-Titanium Alkoxide Complex
25. Facile Preparation of Various Heteroaromatic Compounds via Azatitanacyclopentadiene Intermediates
26. A Novel Tandem Cyclization of 2,7-or2,8-Bis-Unsaturated Esters Mediated by(η┣D12┫D1-Propene)TiX┣D22┫D2(X=Cl or O-i-Pr). A Facile Construction of Bicyclo[3.3.0]octane, -[4.3.0]nonane, and-[3.1.0]hexane Skeletons
27. Remarkably Facile, Unidirectional Isomerization of Titanated Vinylallenes to Cyclobutenyltitanium Compounds. A Practical Construction of a Cyclobutene Framework
28. Expedient Construction of Multiple Stereogenic Centers in an Acyclic System via the Addition of Aldehydes, Ketones, and Chiral Imines to an Enyne−Titanium Alkoxide Complex
29. Titanium Alkoxide-Based Method for Stereoselective Synthesis of Functionalized Conjugated Dienes
30. A Novel Tandem Cyclization of 2,7- or 2,8-Bis-Unsaturated Esters Mediated by (η2-Propene)TiX2 (X = Cl or O-i-Pr). A Facile Construction of Bicyclo[3.3.0]octane, -[4.3.0]nonane, and -[3.1.0]hexane Skeletons
31. Novel silicon-directed alkylative cyclization
32. Chemoselective desilylation of silyl enol ethers with tributyltin fluoride catalyzed by palladium
33. Regioselective arylation of silyl enol ethers of methyl ketones with aryl bromides
34. Facile Preparation of Various Heteroaromatic Compounds via Azatitanacyclopentad lene Intermediates.
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