Reference

Anionic ion exchangers as phase transfer catalysts in alkylation reactions

Anionic ion exchangers as phase transfer catalysts in alkylation reactions. Varona, Fernando; Mijangos, Federico; Lombrana, Jose I.; Diaz, Mario (Department of Chemical Engineering, University of the Basque Country, Bilbao 644, Spain). Special Publication - Royal Society of Chemistry, 196(Progress in Ion Exchange), 87-95 (English) 1997 Royal Society of Chemistry. CODEN: SROCDO. ISSN: 0260-6291. DOCUMENT TYPE: Journal CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) Section cross-reference(s): 21, 67 Com. anionic resins (of the Lewatit series) were used as phase transfer catalysts for alkylation of phenylacetonitrile with 1-bromobutane in excess (50 wt.%) NaOH in a triphasic system. A com. polystyrene-based Type II anionic resin (Lewatit MP-600 by Bayer) was selected because of its better performance. The monoalkylated product predominated. Reaction rate increased when: (1) stirring speed increased to 500-1600 rpm, (2) particle size decreased from 0.902 to 0.402 mm, and (3) higher hydroxyl ion concns. were present in the aq. phase. The presence of halides (e.g. 3508-98-3 and 9056-15-9 which are cas registry numbers of substances are two of reagents here., Br- and I-) in the aq. phase decreased the reaction rate. The use of 1-iodobutane was not used because of the greater lipophilicity of I- in soln. and its affinity for the anion-exchange resins. .

Application of polymer phase transfer catalyst in synthesis of a-butyl phenylacetonitrile

Some chemicals with cas registry numbers like 3508-98-3 are also used. Application of polymer phase transfer catalyst in synthesis of a-butyl phenylacetonitrile. Yu, Shan-xin; Wen, Rui-ming; Ding, Liang-zhong (Department of Chemistry, Yiyang Teacher's College, Hunan 413094, Peop. Rep. China). Changde Shifan Xueyuan Xuebao, Ziran Kexueban, 14(1), 74-76 (Chinese) 2002 Changde Shifan Xueyuan Xuebao Bianjibu. CODEN: CDSYB4. ISSN: 1009-3818. DOCUMENT TYPE: Journal; General Review CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) A review with refs on the application of polymer phase transfer catalyst in the synthesis of a-Bu phenylacetonitrile. The authors reviewed the synthesis of a-Bu phenylacetonitrile catalyzed by poly styrene supported polyethylene glycol resin, polystyrene supported triethanol amine resin, polystyrene supported pyridine resin, poly vinyl chloride supported pyridine resin, and polystyrene supported tri-Bu amine resin. .