SYNTHESIS Butylbenzene

The synthesis of butylbenzene illustrates the acylation-reduction sequence... 

Answer G can be prepared by iodinating r-butylbenzene via procedure V-5. Thus, the synthesis of IX-f becomes... 

The reactions of tetralin in the presence of coal were investigated to determine the extent of conversion along various pathways in the absence of further added catalysts. As may be seen from Figure 1, the yield of products generated under typical liquefaction conditions (450°C, 30 minutes) increases with the amount of coal added. Three products arise from tetralin naphthalene, n-butylbenzene, and 1-methylindan. Positive identification of the latter isomer was made by comparison of gas chromatographic retention times with those of authentic samples of 1- and 2-methylindan prepared by independent synthesis. 

Devise a synthesis of /J-nitro-tert-butylbenzene from benzene. 

Tetradifon is a valuable acaricide for the control of phytophagous mites on a wide range of crops the last step in the synthesis is an example of the Friedel-Crafts reaction, and can be likened to the reaction between t-butylbenzene (62) and a sulfonyl chloride (51) in the presence of aluminium trichloride catalyst to give the sulfone (62) (see Chapter 10, p. 196) (Scheme 37). This reaction is a bimolecular electrophilic substitution reaction(SE2) and... 

In a synthesis of o-di-t-butylbenzene by Burgstahler and Abdel-Rahman the last step, a desulfurization, was carried out originally with freshly prepared W-6 Raney... 

Although SPA remains a viable catalyst for cumene synthesis, it has several important limitations 1) cumene yield is limited to about 95% because of the oligomerization of propylene and the formation of heavy alkylate by-products 2) the process requires a relatively high benzene/propylene (B/P) molar feed ratio on the order of 7/1 to maintain such a cumene yield and 3) the catalyst is not regenerable and must be disposed of at the end of each short catalyst cycle. Also, in recent years, producers have been given increasing incentives for better cumene product quality to improve the quality of the phenol, acetone, and especially a-methylstyrene (e.g., cumene requires a low butylbenzene content) produced from the downstream phenol units. 

Alkene synthesis.1 Alkenes can be prepared from w c-dicarboxylic acids by conversion into the diacyl chloride followed by treatment with /-butyl hydroperoxide. The resulting di-/-butyl peresters (1) are decomposed when heated in solution in /-butylbenzene (N2 or Ar) to give olefins. Use of p-cymene (Wiberg... 

The following synthesis of terf-butylbenzene is an example of the condensation effected by aluminum chloride 654... 

Regulatory SARA 313 nonreportable Manuf./Distrib. ABCR http //www.abcr.de] Acros Org. http //www.acros.be] Aldrich http //www.sigma-aidrich.com] Alfa Aesar http //WWW.aifa.com] ChevronPhillips http //WWW. cpchem. com Indofine http //www.indofinechemicai.com] Lancaster Synthesis Pfaltz Bauer http //www.pfaitzandbauer.com] TCI Am. http //www.tciamerica. com s-Butylbenzene CAS 135-98-8... 

D.J. Liaw, B.Y. Liaw, Synthesis and properties of new polyamides derived from l,4-B/5 (4-aminophenoxy)-2,5-di-tert-butylbenzene and aromatic dicarboxylic acids, J. Polym. Sci. Part A Polym. Chem. 36 (7) (1998) 1069-1074. 

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