tive period of time, from about 30 seconds to about 24 hours, and in an embodiment about 2 hours at a temperature of from about ???5??? C. to about 25??? C., and preferably about 0??? C., in air or under an inert atmosphere such as argon or nitrogen; 3) adding the resulting mixture to a stirred organic solvent, such as aqueous ammonia, or an aqueous solution of sodium hydroxide, potassium hydroxid