Reference

Synthesis of bis(acetylarylene)carboranes and their polymers

Synthesis of bis(acetylarylene)carboranes and their polymers. Teplyakov, M. M.; Khotina, I.Several substances are used for example 88521-27-1 and 21326-80-7 which are their cas registry numbers. A.; Gelashvili, Ts. L.; Korshak, V. V. (Inst. Elementoorg. Soedin., Moscow, USSR). Dokl. Akad. Nauk SSSR, 271(4), 874-7 [Chem.] (Russian) 1983. CODEN: DANKAS. ISSN: 0002-3264. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 25, 29 RCYCR (R = p-PhC6H4, p-PhSC6H4, p-PhOC6H4) were prepd. by treating the corresponding monoiodoarenes with acetylene [74-86-2] in the presence of (Ph3P)2.PdCl2 [28966-81-6], and were converted to the o-carborane derivs. I by treatment with decaborane [17702-41-9] in the presence of PhNMe2 [121-69-7]. I were acetylated in the p- and p'-positions of the benzene rings by treatment with AcCl in the presence of AlCl3. Polymn. of acetylated I with AcPh or its analogs in the presence of HC(OEt)3 [122-51-0] and dry HCl gave polymers II (Z = p-C6H6C6H4-p, p-C6H4SC6H4-p, p-C6H4OC6H4-p; R1 = Ph, p-C6H4-p-C6H4R2, p-C6H4O-p-C6H4R2; R2 = o-carboranyl group) which were crosslinked by heating at 400°. The structure of II was verified by elemental anal., and IR and 13C NMR spectra. No.-av. and wt.-av. mol. wts. of II were in the range 1250-2400 and 3300-4500, resp., and their melting temps. were 90-170°. II were sol. in CHCl3, PhH, PhMe, DMF, and dioxane. .

Use of a pharmaceutical waste product - triethyl orthoformate for manufacture of ethyl acetate

Use of a pharmaceutical waste product - triethyl orthoformate for manufacture of ethyl acetate. Huang, Shengheng (Chem. Raw Mater. Fact., Xuzhou, Peop. Rep. China). Huaxue Shijie, 24(7), 214-16 (Chinese) 1983. CODEN: HUAKAB. ISSN: 0367-6358. DOCUMENT TYPE: Journal CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) Tri-Et orthoformate (I) [122-51-0] obtained as a waste product in the prodn. of chloromycetin [56-75-7] and syntomycin [2787-09-9] was treated with AcOH [64-19-7] to give Et acetate (II) [141-78-6]. The best conversion rate was obtained using 1:1 I-AcOH. II was used in the prepn. of banana oil.