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en: Aerobic oxidation of alcohols using bismuth bromide as a catalyst

en: We developed an environmentally friendly method for aerobic oxidation of alcohols using a commercially available, relatively benign bismuth salt as a catalyst. We found that the catalytic combination of BiBr3 with nitric acid is key for enhancing the reactivity. The reaction proceeds well under air, making the use of pure oxygen unnecessary. Each of the primary or secondary alcohols tested was oxidized to the corresponding aldehydes or ketones using this protocol.

en: Tetrahedron Letters

ja: Tetrahedron Letters


en: Depolymerization of Waste PET with Phosphoric Acid-Modified Silica Gel Under Microwave Irradiation

en: Journal of Polymers and the Environment

ja: Journal of Polymers and the Environment


en: スチレン類二量化に有効な鉄シリカ触媒のXAFS法による構造解析

ja: スチレン類二量化に有効な鉄シリカ触媒のXAFS法による構造解析

en: α-メチルスチレン二量化反応に活性を示す鉄ゾル-ゲル法にて調製した鉄シリカ触媒をX線回折およびX線吸収分光法により評価した．触媒中鉄種の存在状態は仕込みSi /Fe 比に依存し，100 以上では四面体FeOxCl4-x種，50以下ではα-Fe2O3 凝集種が主成分であり，その存在比をXANES解析により求めた．シリカマトリクスに捕捉された孤立FeOxCl4-x が活性種として機能し，固体酸性質を発現する機構について論じた．

en: Advances in X-Ray Chemical Analysis, Japan

ja: X線分析の進歩


en: The Development of the New Synthetic Methods Using Metallic Strontium

ja: 金属ストロンチウムを用いる新しい合成手法の開発

en: We found the interesting results that alkylation of carboxylic acids with methyl iodide using strontium metal proceeded smoothly to afford the corresponding monomethylated ketones, rather than the dimethylated alcohols, preferentially in moderate to good yields. Using the carboxylic acid sodium salt, the yield decreases slightly, but the reaction controls the over-addition of methyla-ting agent to give the dramatically improvement with high selectivities. Next, when benzoic acid reacted with metallic strontium and alkyl iodides, the unexpected reactions occurred to give p-alkylated products of the aromatic ring of benzoic acid in a trace amount. We were interested in the p-allylated product because this allylation reaction is unusual in these conditions and there are only a few reports of the p-alkylation of aromatic carbonyl compounds. As the results of various investigations, the p-alkylated products were obtained predominantly in good yields. Furthermore, it was found that the convenient bulky tert-benzylic alcohol benzoates were prepared by the dialkylation of methyl benzoate with methyl or i-butyl iodide in the presence of metallic strontium, followed by the addition of benzoyl chloride, benzoic anhydride or acetic anhydride as two portions.

en: Journal of Synthetic Organic Chemistry, Japan

ja: 有機合成化学協会誌


en: Cytometric analysis on adverse action of diphenyl ditellurde on rat thymocytes: Cell shrinkage as cytotoxic parameter

en: 細胞萎縮を細胞毒性の指標として，有機テルル化合物の毒性評価を行った．ジフェニル·ジテルライドはサブマイクロ濃度でラット胸腺細胞の細胞内カルシウムイオン上昇させ，カスパーゼ依存性にアポトーシスを誘発することが明らかになった．よって，有機テルル化合物の使用·処分には注意を要することが示唆された．

en: Environmental Toxicology

ja: Environmental Toxicology


en: A convenient procedure for bismuth-mediated Barbier-type allylation of aldehydes in water containing fluoride ions.

en: A new and convenient procedure for synthesis of homoallylic alcs. in generally good to excellent yields has been developed. The bismuth-mediated Barbier-type allylation of aldehydes (arom., aliph., alicyclic and heterocyclic) with allyl bromide has been carried out in water in the presence of fluoride ions.

en: Organic & Biomolecular Chemistry

ja: Organic & Biomolecular Chemistry


en: The Barbier-type alkylation of aldehydes with alkyl halides in the presence of metallic strontium.

en: In the presence of metallic strontium, the Barbier-type alkylation of aldehydes with alkyl iodides proceeded smoothly to afford secondary alcs., e.g., I, in moderate to good yields. The unusual addn. reaction of Et benzoate with tert-Bu iodide gave 4-tert-butylbenzoate in good yield. Using strontium isopropoxide, the Meerwein-Ponndorf-Verley-type redn. of the aldehyde proceeded smoothly under reflux conditions in 2-propanol.

en: Bulletin of the Chemical Society of Japan


en: 4) A Convenient One Pot Allylation of Aldehydes with Allylic Halides Prepared in situ from Allylic Alcohols in the Presence of Metallic Bismuth

ja: Bulletin of the Chemical Society of Japan


en: A Grignard-Type Addition of an Allyl Unit to Carbonyl Compounds Containing a Carboxyl Group by Using BiCl3-Zn(0)-Allyl Bromide.

en: In the presence of BiCl3-Zn(0), nearly equimolar amts. of allyl bromide reacted with carbonyl compds. contg. a carboxyl group to afford the corresponding homoallylic alcs. having a carboxyl group or the intramol. dehydrated lactones in good yields.


en: Asymmetric trimethylsilylcyanation of aldehydes utilizing chiral bismuth compounds. A frontier in bismuth mediated synthetic reactions.

en: Bismuth(III) chloride (BiCl3) was found to work efficiently as a versatile catalyst for cyanation of aldehydes with trimethylsilyl cyanide to afford the corresponding cyanohydrins in high yields. Triphenylbismuthan (Ph3Bi) is also effective. The reaction has been applied to the asym. cyanation of a variety of aldehydes in high yields with moderate to good enantioselectivities by use of a chiral bismuth catalyst prepd. in situ from BiCl3 and (2R,3R)-(+)-diethyl tartrate.

en: Tetrahedron: Asymmetry

ja: Tetrahedron: Asymmetry


en: The Convenient and Useful Esterification of Bulky Tertiary Alcohols Using Strontium Compounds

en: Chemistry Letters

ja: Chemistry Letters


en: Reductive Self-coupling Reaction of Imines and Aldehydes Induced by Strontium Metal


en: A New Synthetic Method for Para Alkylation of Benzoic Acids Using Metallic Strontium and Alkyl Iodide


en: A New Synthetic Method for Methyl Ketones from Carboxylic Acids Using Metallic Strontium and Methyl Iodide


en: The Chemistry of Alkylstrontium Halide Analogue Part 2: Barbier-Type Dialkylation of Esters with Alkyl Halides

en: European Journal of Organic Chemistry

ja: European Journal of Organic Chemistry


en: The Chemistry of Alkylstrontium Halide Analogues: Barbier-type Alkylation of Imines with Alkyl Halides


en: Solvent-free Imino-Aldol Three-component Couplings on a Conveniently-prepared and Reusable Phosphoric Acid-Silica Gel Support


en: Water Accelerated Allylation of Aldehydes by Using Water Tolerant Grignard-Type Allylating Agents from Allylmagnesium Chloride and Various Metallic Salts

en: Some water-tolerant allylating agents prepared in situ from allylmagnesium chloride and bismuth trichloride, tin tetrachloride, tin dichloride, antimony trichloride, indium trichloride, or nickel dichloride reacted with aldehydes in THF-H2O to afford the desired homoallylic alcohols in good yields. The present reaction proceeded more smoothly than that under non-aqueous media.

ja: アリルGrignard試薬と三塩化ビスマス，四塩化スズ，二塩化スズ，三塩化アンチモン，三塩化インジウム及び二塩化ニッケルから調製したアリル化試剤は水に安定であり，アルデヒドと速やかに反応し対応するホモアリリックアルコールを高収率で与える．本反応は非水条件下より，含水条件下の方が反応は速やかに反応する．


en: Organic Solvent-Free One-Pot Reduction of Imines Generated in situ from Aldehydes and Aniline by Tributyltin Hydride on Silica Gel

en: Imines generated in situ from aldehydes and aniline can be reduced using tributyltin hydride on silica gel under solvent-free conditions to provide te corresponding amines in good yields.

ja: アルデヒドとアニリンから反応系中で調製したイミンは無溶媒中固体シリカゲル上でトリブチルスズヒドリドを用いると容易に還元でき，対応するアミンを高収率で得られることが出来る．


en: Bismuth Trichloride Catalyzed Efficient Reductive Etherification of Carbonyl Compounds with Alcohols: A Novel Method for Preparation of Symmetrical and Unsymmetrical Ethers

en: The reductive homocoupling of a carbonyl compound and heterocoupling of a carbonyl compound with a non-protected alcohol were both effected smoothly at room temperature with triethylsilane in the presence of a catalytic amount of bismuth trichloride to afford the corresponding ethers in good yields.

ja: カルボニル化合物同士の還元的ホモカップリングやカルボニル化合物と無保護のアルコールとの還元的ヘテロカップリング反応は，触媒量の三塩化ビスマスとトリエチルシランを用いる事により，対応するエーテルを高収率で得ることが出来る．


en: Solvent-Mediated Chemoselective Reduction of Aldehydes by Using Tributyltin Hydride in Methanol, Aqueous Organic Solvents, or Water: An Environmentally Benign Process

en: Aldehydes are reduced chemoselectively by using tributyltin hydride in methanol, aqueous organic solvents, or water to provide the corresponding alcohols in high yields. No additional catalyst is required.

ja: トリブチルスズヒドリドを用いるアルデヒド還元反応は，触媒を用いることなく，メタノール中，含水溶媒中或いは水中で速やかに進行し，対応するアルコールを高収率で得ることが出来る．

en: Tetrahedron Letters


en: A novel aqueous Barbier-Grignard-type allylation of aldehydes in a Mg/BiCl3 bimetallic system.

en: In the presence of BiCl3-Zn(0), nearly equimolar amts. of allyl bromide reacted with carbonyl compds. contg. a carboxyl group to afford the corresponding homoallylic alcs. having a carboxyl group or the intramol. dehydrated lactones in good yields.


en: The cross-coupling reaction of aldehydes with -diketones by the use of bismuth trichloride and metallic zinc.

en: In the presence of bismuth trichloride and metallic zinc, -diketones react with aldehydes in THF under reflux to afford the corresponding , -dihydroxy ketones in moderate to good yields. The reaction takes place even in aq. media.

en: Chemistry Letters