Water → HCID 69619745, compound

Participants

Reaction Conditions

Reaction Steps

(R)-2-(Toluene-4-sulfonyloxymethyl)-2,3,8,9-tetrahydro-7H-1,4-dioxino[2,3-e]indol-8-one (1.05 g, 2.80 mmole) and phenylbutylamine (1.99 ml, 12.5 mmole) were combined in 15 ml of dry DMSO and heated to 85° C. for 4 hours under a nitrogen atmosphere. After cooling to room temperature, 200 ml of water was added and the mixture was extracted twice with 300 ml portions of 50% ethyl acetate in hexane. The combined organic phases were washed with brine, dried over MgSO4, filtered and concentrated in vacuum to yield an oil, which was column chromatographed on silica gel using 1% methanol/CH2Cl2 as eluant. The free base of the title compound (0.26 g, 30%) thus obtained was crystallized from ethanol with the addition of one equivalent of fumaric acid to give 0.25 g of the (S) enantiomer of the title compound as an tan solid fumarate, one-half hydrate, m.p. 185°-186° C.

Provenance & Evidence