HCID 69585940, compound → HCID 11324971, compound

Participants

Reaction Conditions

Reaction Steps

A solution of the above 7-(1,3-dioxo-1,3-dihydro-isoindol-2-ylmethyl)-1,4-dioxa-8-aza-spiro[4.5]decane-8-carboxylic acid ethyl ester (0.44 g, 1.2 mmol) in a mixture of 1N hydrochloric acid (18 ml) and tetrahydrofuran (18 ml) was heated a 75° C. under nitrogen with stirring for 18 h. The tetrahydrofuran was removed in vacuo and the residue was extracted with dichloromethane (2×75 ml). The combined organic extracts were washed with a saturated sodium bicarbonate solution (50 ml), dried (MgSO4), filtered and the solvent removed in vacuo affording 0.42 g (>100%) of 2-(1,3-dioxo-1,3-dihydro-isoindol-2-ylmethyl)-4-oxo-piperidine-1-carboxylic acid ethyl ester as a solid.

Provenance & Evidence