Patent ID: 6018049
Filing Date: 2000-01-25
Classification: C07D

Abstract:
A process for the preparation of a compound of the formula (III): ##STR7## wherein R.sup.1 is an optionally substituted alkyl or an optionally substituted aryl; R.sup.2 is an optionally substituted alkyl; R.sup.3 is an optionally substituted alkyl, an optionally substituted alkenyl, an optionally substituted aralkyl, or an optionally substituted heteroarylalkyl; and n is an integer of 1-3,which comprises reacting a compound of the formula (I): ##STR8## wherein R.sup.1, R.sup.2, and n are as defined above, with a compound of the formula (II):R.sup.3 OH (II)wherein R.sup.3 is as defined above, in the presence of phosphine and either of dialkyl azodicarboxylate and tetraalkyl azodicarboxamide.