PHTHALAN COMPOUND, ITS INTERMEDIATE, METHOD FOR PRODUCING THE SAME AND METHOD FOR PRODUCING CITALOPRAM

摘要

PROBLEM TO BE SOLVED: To provide an industrially advantageous method for producing citalopram by which the environmental load is small without causing lowering of yield and purity by side reactions. ;SOLUTION: This method for producing the citalopram comprises using a phthalan compound prepared by passing a 5-formylphthalide as a key intermediate through various new intermediates and represented by the formula [V] as a raw material.;COPYRIGHT: (C)2001,JPO