N-[(4-Methylphenyl)sulfonyl]-L-glutamic acid → HCID 12297768, compound

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Reaction Steps

To a solution of 4-benzyl-2-(toluene-p-sulphonyloxymethyl)morpholine (18.1 g.) in methanol (100 ml.) was added a solution of (+)-toluene-p-sulphonylglutamic acid (16.0 g.) in methanol (50 ml.) and the mixture was allowed to crystallise during 12 hours. The mixture was filtered, the filtrate was put on one side, and the filtered solids (18.3 g.) were recrystallised from methanol (150 ml.) to obtain the (+)-toluene-p-sulphonylglutamic acid salt of (2S)-4-benzyl-2-(toluene-p-sulphonyloxymethyl)morpholine (14.0 g.), m.p. 184° C. This salt was stirred with a mixture of 2N sodium hydroxide and ether. The ether layer was separated, dried and the ether was distilled to leave optically pure (2S)-4-benzyl-2-(toluene-p-sulphonyloxymethyl)morpholine as an oil, from which was prepared the hydrochloride m.p. 150° C., [α]D25 + 19.4°(c, 5 in methanol).

Provenance & Evidence