| http://www.w3.org/ns/prov#value | - Route (3): The reaction of compound of formula (IIIe) where L1 is a leaving group such as halogen atom, p-toluenesulfonate, methanesulfonate, trifluoromethanesulfonate and the like and all symbols are as defined earlier with a compound of formula (IIId) where R7, R8 and Ar are as defined earlier to produce a compound of the formula (III) may be carried out in the presence of solvents such as THF,
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