研究者詳細 - 押木　俊之

MISC - 押木　俊之

分割表示 99 件中 61 - 80 件目／全件表示 >>

Substituent effect on organotin Tp* compounds as the Tp* reagent for the preparation of mono Tp* complexes of group 4-6 metals (Tp* = tris(3,5-dimethylpyrazol-1-yl)hydroborate)

T Oshiki, K Mashima, S Kawamura, K Tani, K Kitaura

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 73 ( 8 ) 1735 - 1748 2000年8月

記述言語：英語出版者・発行元：CHEMICAL SOC JAPAN

Organotin compounds [Tp* SnCl3-nBun] (2: n = 1; 3: n = 2) having a Tp* ligand(Tp* = tris(3,5-dimethylpyrazol-1-yl)hydroborate) are useful reagents for introducing a Tp* ligand on Group 4 and 5 metals and chromium. The test reactions of these organotin compounds along with [Tp*SnCl3] (1) with ZrCl4, affording a known complex [Tp*ZrCl3] (4), were examined. The reaction rates were in the order 3 > 2 much greater than 1. This tendency was understood by the average Sn-N(Tp* ligand) bond distance being longer in the order 3 > 2 > 1 as revealed by the crystallographic studies and the orbital interactions between the Tp* ligand and the SnCl3-nBun fragments estimated by the ab initio calculations for 1-3. On the basis of the above findings, we applied the compound 3 to prepare Tp* complexes of Group 4-6 metals. Reactions of TiCl4 with an equimolar amount of 3 afforded [Tp*TiCl3] (7) in good yields after a simple rinse to remove the resulting tin compound, SnBu2Cl2. [Tp*HfCl3] (8) was prepared in moderate yield by reaction of [HfCl4(THF)(2)] with 3 under severe conditions. Similarly, the reactions of 3 with a stoichiometric amount of [NbCl4(THF)(2)] or [NbCl5(OEt)(2)] and TaCl5 in toluene gave [Tp*NbCl3] (9) and [Tp*TaCl3][TaCl6] (10), respectively. We also applied our synthetic method to prepare Tp* complexes of vanadium, [Tp*VCl2(THF)] (11), [Tp*VCl2(DNAP)] (12) (DMAP = 4-dimethylaminopyridine), and [Tp*VCl2(=NC6H3Me2-2,6)] (13) and those of chromium, [Tp*CrCl2(L)] (14: L = THF; 15: L = H2O; 16: L = DMAP). Some of these Tp* complexes, 4, 8, 12, 13, 15, and 16 were crystallographically characterized to have discrete octahedral geometry containing the facial coordination of the Tp* ligand.

DOI： 10.1246/bcsj.73.1735

Web of Science

researchmap

Substituent effect on organotin Tp* compounds as the Tp* reagent for the preparation of mono Tp* complexes of group 4 - 6 metals (Tp* = tris(3,5-dimethylpyrazol-1-yl)hydroborate)

Toshiyuki Oshiki, Kazushi Mashima, Shin-Ichi Kawamura, Kazuhide Tani, Kazuo Kitaura

Bulletin of the Chemical Society of Japan 73 ( 8 ) 1735 - 1748 2000年8月

記述言語：英語

Organotin compounds [Tp*SnCl3-(n)Bu(n)] (2: n = 1
3: n = 2) having a Tp* ligand (Tp* = tris(3,5-dimethylpyrazol-1-yl)hydroborate) are useful reagents for introducing a Tp* ligand on Group 4 and 5 metals and chromium. The test reactions of these organotin compounds along with [Tp*SnCl3] (1) with ZrCl4, affording a known complex [Tp*ZrCl3] (4), were examined. The reaction rates were in the order 3 &gt
2 &gt
&gt
1. This tendency was understood by the average Sn-N(Tp* ligand) bond distance being longer in the order 3 &gt
2 &gt
1 as revealed by the crystallographic studies and the orbital interactions between the Tp* ligand and the SnCl3-(n)Bu(n) fragments estimated by the ab initio calculations for 1 - 3. On the basis of the above findings, we applied the compound 3 to prepare Tp* complexes of Group 4 - 6 metals. Reactions of TiCl4 with an equimolar amount of 3 afforded [Tp*TiCl3] (7) in good yields after a simple rinse to remove the resulting tin compound, SnBu2Cl2. [Tp*HfCl3] (8) was prepared in moderate yield by reaction of [HfCl4(THF)2] with 3 under severe conditions. Similarly, the reactions of 3 with a stoichiometric amount of [NbCl4(THF)2] or [NbCl5(OEt)2] and TaCl5 in toluene gave [Tp*NbCl3] (9) and [Tp*TaCl3][TaCl6] (10), respectively. We also applied our synthetic method to prepare Tp* complexes of vanadium, [Tp*VCl2(THF)] (11), [Tp*VCl2(DNAP)] (12) (DMAP = 4-dimethylaminopyridine), and [Tp*VCl2(=NC6H3Me2-2,6)] (13) and those of chromium, [Tp*CrCl2(L)] (14: L = THF
15: L = H2O
16: L = DMAP). Some of these Tp* complexes, 4, 8, 12, 13, 15, and 16 were crystallographically characterized to have discrete octahedral geometry containing the facial coordination of the Tp* ligand.

DOI： 10.1246/bcsj.73.1735

Scopus

researchmap

Improved synthesis and crystal structure of TiCl3(tmeda)(thf): A highly stereoselective pinacol coupling reagent for aromatic aldehydes

T Oshiki, T Kiriyama, K Tsuchida, K Takai

CHEMISTRY LETTERS ( 4 ) 334 - 335 2000年4月

記述言語：英語出版者・発行元：CHEMICAL SOC JAPAN

A monomeric titanium(III) complex, TiCl3(tmeda)(thf) (1), has been prepared by a reaction of TICl4 with TMEDA, Zn, and a catalytic amount of PbCl2 in an almost quantitative yield. The solid state structure of 1 is revealed by X-ray crystallographic analysis. The complex 1 couples aromatic aldehydes under mild conditions to give 1,2-diols in good to excellent yields with high dl-selectivities.

DOI： 10.1246/cl.2000.334

Web of Science

researchmap

Improved Synthesis and Crystal Structure of TiCl₃(tmeda) (thf) : A Highly Stereoselective Pinacol Coupling Reagent for Aromatic Aldehydes(共著)

Oshiki T, Kiriyama T, Tsuchida K, Takai K

Chemistry Letters ( 4 ) 334 - 335 2000年4月

Determination of the Absolute Configuration of Partly Fluorinated Allylic Alcohols"jointly worked"

Takagi Y, Nakatani T, Itoh T, Oshiki T

Tetrahedron Letters 41 ( 41 ) 7889 - 7892 2000年

Determination of the Absolute Configuration of Partly Fluorinated Allylic Alcohols

Takagi Y, Nakatani T, Itoh T, Oshiki T

Tetrahedron Letters 41 ( 41 ) 7889 - 7892 2000年

Improved synthesis and crystal structure of TiCl3(tmeda)(thf): A highly stereoselective pinacol coupling reagent for aromatic aldehydes

Toshiyuki Oshiki, Takayuki Kiriyama, Kazuaki Tsuchida, Kazuhiko Takai

Chemistry Letters ( 4 ) 334 - 335 2000年

記述言語：英語出版者・発行元：Chemical Society of Japan

A monomeric titanium(III) complex, TiCl3(tmeda)(thf) (1), has been prepared by a reaction of TiCl4 with TMEDA, Zn, and a catalytic amount of PbCl2 in an almost quantitative yield. The solid state structure of 1 is revealed by X-ray crystallographic analysis. The complex 1 couples aromatic aldehydes under mild conditions to give 1,2-diols in good to excellent yields with high d/-selectivities.

DOI： 10.1246/cl.2000.334

Scopus

researchmap

Substituent Effect on Organotin T_P^* Compounds as the T_P^* Reagent for the Preparation of Mono T_P^* Complexes of Group 4-6 Metals(T_P^*=Tris(3.5-dimethylpyrazol-1-y<sup>・・・

Toshiyuki Oshiki, Kazushi Mashima, Kazuhide Tani

Bulletin of the Chemical Society of Japan 73 ( 8 ) 1735 - 1748 2000年

2価サマリウムビストリフラート錯体の合成と反応性

真島和志, 押木俊之, 谷一英

希土類 = Rare earths ( 34 ) 186 - 187 1999年5月

Synthesis, characterization, and reaction of Samarium(II) bistrifluoromethanesulfonate derived from metallic samarium.

K Mashima, T Oshiki, K Tani

ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY 217 U1039 - U1039 1999年3月

Oxidative Addition of a Hypervalent Transannular Sulfur-Sulfur Bond to a Pd(0)Complex : Synthesis and Crystal Structure of 1,5-Dithioniabicyclooctanepalladium((]G0002[))Bis(trifluoromethanesulfonate)Having Phosphine Ligands(共著)

Oshiki T, Mashima K, Yamagata T, Tani K

Bulletin of the Chemical Society of Japan 71 ( 12 ) 2859 - 2864 1998年12月

Isolation and reactions of a tantalum-imine complex TaCl3(dme)(PhCH=NCH2Ph)

K Takai, T Ishiyama, H Yasue, T Nobunaka, M Itoh, T Oshiki, K Mashima, K Tani

ORGANOMETALLICS 17 ( 23 ) 5128 - 5132 1998年11月

記述言語：英語出版者・発行元：AMER CHEMICAL SOC

A new tantalum-imine complex TaCl3(dme)(PhCH=NCH2Ph) (1) (DME = 1,2-dimethoxy-ethane) was synthesized by treatment of N-(benzylidene)benzylamine with low-valent tantalum derived from TaCl5 and zinc in DME and toluene. The molecular structure of complex 1 was determined by X-ray crystallographic analysis, and its reactivity toward unsaturated compounds examined.

DOI： 10.1021/om980380l

Web of Science

researchmap

Isolation and Reactions of a Tantalum-Imine Complex TaCl³(dme)PhCH=NCH²Ph)(共著)

Takai K, Ishiyama T, Yasue H, Nobunaka T, Itoh M, Oshiki T, Mashima K, Tani K

Organometallics 17 ( 23 ) 5128 - 5132 1998年11月

The first oxidative addition of a hypervalent compound to metallic lanthanoid: Synthesis, characterization, and reaction of samarium(II) bis(trifluoromethanesulfonate) derived from metallic samarium and 1,5-dithioniabicyclo[3.3.0]octane bis(trifluoromethanesulfonate)

K Mashima, T Oshiki, K Tani

JOURNAL OF ORGANIC CHEMISTRY 63 ( 20 ) 7114 - 7116 1998年10月

記述言語：英語出版者・発行元：AMER CHEMICAL SOC

The First Oxidative Addition of a Hypervalent Compound to Metallic Lanthanoid : Synthesis, Characterization, and Reaction of Samarium((]G0002[))Bis(trifluoromethanesulfonate)Derived from Metallic Samarium and 1,5-Dithioniabicyclo[3.3.0]octane Bis(trifluoromethanesulfonate)"jointly worked"

DOI： 10.1021/jo981436o

Web of Science

researchmap

Dialkylchromium Complexes bearing a Hydrotris(3,5-dimethylpyrazolyl)borate Ligand : Synthesis and Crystal Structures of Tp^*CrMe²(DMAP)and Tp^*Cr(CH²Ph)²(DMAP)(DMAP=4 dimethylaminopyridine)(共著)

Mashima K, Oshiki T, Tani K, Aoshima T, Urata H

Journal of Organometallic Chemistry 569 ( 1-2 ) 15 - 19 1998年10月

Mashima K, Oshiki T, Tani K

Journal of Organic Chemistry 63 ( 20 ) 7114 - 7116 1998年10月

Dialkylchromium Complexes bearing a Hydrotris(3,5-dimethylpyrazolyl)borate Ligand : Synthesis and Crystal Structures of Tp^*CrMe²(DMAP)and Tp^*Cr(CH²Ph)²(DMAP)(DMAP=4 dimethylaminopyridine)"jointly w・・・

Mashima K, Oshiki T, Tani K, Aoshima T, Urata H

Journal of Organometallic Chemistry 569 ( 1-2 ) 15 - 19 1998年

Oshiki T, Mashima K, Yamagata T, Tani K

Bulletin of the Chemical Society of Japan 71 ( 12 ) 2859 - 2864 1998年

Tp*Sn(Cl)Bu₂ as a Convenient Reagent for the Preparation of Hydrotris(3,5Dimethylpyrazolyl)borate Complexes of Niobium, Tantalum, and Zirconium(共著)

Mashima K, Oshiki T, Tani K

Organometallics 16 ( 13 ) 2760 - 2762 1997年6月

希土類金属からの直接合成法によるアゾベンゼン錯体およびシクロオクタテトラエン錯体の合成と構造

真島和志, 福元博基, 押木俊之, 谷一英, 中山祐正, 中村晃

希土類 = Rare earths ( 30 ) 96 - 97 1997年5月

　前のページ - 次のページ　

<押木 俊之>

MISC - 押木 俊之

<押木　俊之>

MISC - 押木　俊之