Reference

Labeling of long-chain fatty acids by nucleophilic halogen substitution

Labeling of long-chain fatty acids by nucleophilic halogen substitution. Hallaba, E.; El-Bayoumi, S.; El-Wetery, A. S. A. 25316-59-0 and 7790-26-3 are also occured in this study.; Coenen, H. H.; Kloster, G.; Stoecklin, G. (Inst. Chem., Kernforschungsanl. Juelich G.m.b.H., Juelich D-5170, Fed. Rep. Ger.). Proc. Int. Symp. Appl. Technol. Ioniz. Radiat., Meeting Date 1982, Volume 2, 903-12. Edited by: Al-Soraya, Ahmed M. A. King Saud Univ. Libr.: Riyadh, Saudi Arabia. (English) 1983. CODEN: 50PLA5. DOCUMENT TYPE: Conference CA Section: 22 (Physical Organic Chemistry) Section cross-reference(s): 23 The SN2 kinetics of Na123I with 16-bromoxexadecanoic acid (I) in Me2CO show that with quaternary ammonium or phosphorium salts the activation energy is reduced from 100 to 38-52 kJ/mol; benzyl quaternary salts are poor reaction catalysts due to competing reactions. The reaction of I with Na131I, to give 16-iodohexadecanoic acid-131I, is optimized in C6H6. .

Preparation of quaternary ammonium bromides and iodides from tertiary amines and benzyl chloride

Preparation of quaternary ammonium bromides and iodides from tertiary amines and benzyl chloride. Yamashita, Tatsuji; Hatayama, Mio (Lion Akzo Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 04005263 A2 9 Jan 1992 Heisei, 5 pp. (Japan). CODEN: JKXXAF. CLASS: ICM: C07C211-63. 25316-59-0 and 7647-15-6 which are cas registry numbers are also used here. ICS: C07C209-12; C07C213-00; C07C217-08. APPLICATION: JP 90-105001 20 Apr 1990. DOCUMENT TYPE: Patent CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Section cross-reference(s): 5, 21 [PhCH2NR1R2R3]+ X- (R1-R3 = alkyl, alkenyl, aralkyl, polyoxyalkylene; X = Br, iodo), useful as microbicides and phase-transfer catalysts (no data), are prepd. by treatment of R1NR2R3 (R1-R3 = same as above) with PhCH2Cl and mono- or bivalent bromides or iodides. Bu3N was treated with NaBr and PhCH2Cl in MeOH at 50-60° for 4 h to give 92.2% benzyltributylammonium bromide, vs. 16% conversion of benzyldibutylamine, when benzyldibutylamine was autoclaved with BuBr in MeCN for 4 h. .