Sodium Cyanide → alpha-Hydroxy-2-nitro-3-phenylbenzofuran-7-acetonitrile

Participants

Reaction Conditions

Reaction Steps

A stirred mixture of 2.7 g. (0.010 mole) of 2-nitro-3-phenylbenzofuran-7-aldehyde (described in Belgian Patent 846,502, Example 13) and 20 ml. of diethyl ether is treated with 1.6 g. (0.015 mole) of sodium bisulfite in 10 ml. of water. After 30 minutes, 30 ml. of chloroform is added, followed by 1.5 g. (0.030 mole) of sodium cyanide in 5 ml. of water after an additional 30 minutes. About 0.7 g. of sodium bisulfite is added 1.5 hours later, and the mixture is cooled to 0° C. 30 minutes after the bisulfite addition and maintained for about 16 hours. The organic layer is separated, washed with aqueous sodium bisulfite solution, then with water, and dried over magnesium sulfate. Evaporation of the solution provides a solid which is recrystallized from a chloroform-heptane mixture to provide yellow crystals of α-hydroxy-2-nitro-3-phenylbenzofuran-7-acetonitrile, m.p. 137°-139° C.

Provenance & Evidence