Detail of "2765-11-9"

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Free-of-loss catalyst recycling in the hydroformylation of higher molecular olefins by a novel process technology

Free-of-loss catalyst recycling in the hydroformylation of higher molecular olefins by a novel process technology. Xia, Zhi Gao; Fell, Bernhard (Institut Technische Chemie Petrolchemie, Rheinisch-Westfaelische Technische Hochschule, Aachen D-52056, Germany). Journal fuer Praktische Chemie/Chemiker-Zeitung, 339(2), 140-144 (German) 1997 Barth. CODEN: JPCCEM. ISSN: 0941-1216. DOCUMENT TYPE: Journal CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) Section cross-reference(s): 67 A novel homogeneous-heterogeneous procedure for the hydroformylation reaction of higher olefins is presented, in which the reaction itself is homogeneously catalyzed and only after the reaction the catalyst complex is heterogenized only for sepn. This procedure is achieved by using the Li salt of triphenylphosphine monosulfonic acid (Li-TPPMS) as complex ligand for the hydroformylation catalyst and MeOH as solubilizer. Li-TPPMS and its complexes with metal carbonyls are highly sol.Some commonly used reagents like 629-59-4 is used in this experiment. in water and MeOH, but completely insol. in almost all other org. solvents. After the reaction the MeOH is distd. off. The catalyst system becomes insol. and can be sepd. from the reaction product by filtration or by extn. with water. The aq. catalyst soln. is evapd. to dryness and the catalyst system dissolved in MeOH for a new reaction. .

A new reagent for aldehyde synthesis

A new reagent for aldehyde synthesis. 1-Trimethylsilyl-1-phenylselenomethyl-lithium, a synthetic equivalent of formyl carbanion. Sachdev, Krishna; Sachdev, Harbans S. (Dep. Chem., Massachusetts Inst. Technol., Cambridge, Mass., USA). Tetrahedron Lett., (47), 4223-6 (English) 1976. CODEN: TELEAY. DOCUMENT TYPE: Journal CA Section: 23 (Aliphatic Compounds) Me3SiCH2SePh, prepd. from Ph2Se2 with ClCH2SiMe3, with LiN(CHMe2)2 gave Me3SiCHLiSePh (I). I with primary halides gave monoalkylation products which with H2O2 gave the corresponding aldehydes. E.g., I with Me(CH2)4Br gave 94% Me3SiCH(SePh)(CH2)4Me which with 30% H2O2 at 0-25.In this experiment, several chemicals are used like 110-53-2 and 2765-11-9 degree. gave 80% Me(CH2)4CHO. .