Alcohol-ester separation by recrystallization

Details Alcohol-ester separation by recrystallization Alcohol-ester separation by recrystallization

C - Chemistry, Metallurgy

07

C

C07C 303/44 (2006.01) C07C 309/73 (2006.01) C07C 323/66 (2006.01) C07C 309/74 (2006.01) C07C 309/76 (2006.01)

Patent

CA 2058306

2058306 9115472 PCTABS00007 A process is disclosed for the separation of an enantiomerically enriched 1-tosyloxy-2-acyloxy-3-butene and an enantiomerically enriched 1-tosyloxy-2-hydroxy-3-butene from a first mixture containing both compounds. The process includes the steps of: (a) forming a solution of the mixture in an organic solvent; (b) bringing the solution formed in (a) to a temperature wherein most of the enantiomerically enriched 1-tosyloxy-2-hydroxy-3-butene precipitates, leaving in solution most of the enantiomerically enriched 1-tosyloxy-2-acyloxy-3-butene; and (c) separating the precipitate formed in (b) from the solution.

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