Acetic Acid → 2,3-Dihydro-1H-isoindole-1-carboxylic acid methyl ester hydrochloride

Participants

Reaction Steps

Octahydro-1H-isoindole-1-carboxylic acid hydrochloride used as an intermediate in this preparation is obtained by the following method. Following a procedure given in Gazz. Chim. Ital, 106, 65(1976), 2,3-dihydro-1H-isoindole-1-carboxylic acid, methyl ester, hydrochloride is prepared. This compound, 2.14 g, is dissolved in 100 ml of methanol and 5 ml of acetic acid and hydrogenated over 0.5 g of 10% rhodium/carbon catalyst. The catalyst is removed by filtration and the filtrate is concentrated to give a residue which solidifies on trituration with ether. Recrystallization from methanol-ether gives a pure sample of methyl octahydro-1H-isoindole-1-carboxylate hydrochloride, mp 181°-183° C.

Provenance & Evidence