Graphite bisulfate esterification

ESTERIFICATION 6-ChIoro-l-p-chIorobenzenesuIfonyIoxybenzotriazole. Graphite bisulfate. Hexamethylphosphoric triamide. l-Methyl-2-bromopyridinium iodide. Tri-phenylphosphine ditriflate. Hexamethylphosphoric triamide. 

Phenethyl alcohol, acetic acid, and graphite bisulfate stirred 22 hrs. at room temp, in dry cyclohexane phenethyl acetate. Y 97%. - The esterification proceeds easily at room temp, in the presence of relatively small amounts of the above catalyst. F. e., also optically active compds. with retention of configuration, s. J. Bertin et al.. Am. Soc. 9(5, 8113 (1974) f. method cf. M. Itoh, D. Hagiwara, and J. Notani, Synthesis 1975, 456. 

Graphite-bisulfate Support for esterification and ketal formation Bertin et al., 1974... 

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