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The biphasic solution was transferred to a separatory funnel and diluted further with EtOAc and brine.

After 1 h, the reaction mixture was partitioned between EtOAc and H2O, and transferred to a separatory funnel.

After mixing, the solution was allowed to separate by gravity in a separatory funnel at ambient temperature.

Wash the soap thus formed into a separatory funnel of 200 cubic centimeters capacity with 80-100 cubic centimeters water.

Draw off the petroleum ether layer as closely as possible by means of a slender glass siphon into a separatory funnel of 500 cc. capacity.