Water → HCID 69382578, compound

Participants

Reaction Conditions

Reaction Steps

A 500 mL RBF was charged with 5-bromo-1-ethoxycarbonylmethyl-8-methyl-1-propyl-1,3,4,9-tetrahydro-pyrano[3,4-b]indole-7-carboxylic acid benzyl ester (12.00 g, 23 mmol), NMP (100 mL), and CuCN (20.34 g, 0.227 mol). The reaction was heated to 190° C. with vigorous stirring for 45 minutes. The reaction was then cooled to ambient temperature, diluted with EtOAc followed by water (300 mL). A 1:1 mixture of Celite/silica gel were added to the mixture. This suspension was stirred for several minutes and filtered through a pad of Celite. The Celite pad was washed with EtOAc, and the filtrate was washed with water (5×) and saturated NaCl (1×), dried over MgSO4, and concentrated. Upon trituration with hexanes, 8.82 g (81.8%) of a light tan solid was obtained. 1H NMR (CDCl3) δ 10.11 (br s, 1H), 8.12 (s, 1H), 7.40 (m, 5H), 5.37 (s, 2H), 4.22 (m, 2H), 3.95 (m, 2H), 3.00 (m, 4H), 2.83 (s, 3H), 2.00 (m, 2H), 1.30 (m, 5H), 0.89 (t, J=7.6 Hz, 3H).

Provenance & Evidence