| http://www.w3.org/ns/prov#value | - One method of preparing the amide derivatives is to contact a compound of Formula Ia, in which either R.sub.1 and/or R.sub.2 isrepresented by --OH, with a halogenating agent such as thionyl chloride, oxalyl chloride, phosphorus oxychloride, phosphorus pentachloride, etc.
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