Methyl iodide → 4-[2-(2,4-Dichloro-phenyl)-1-hydroxy-1-trifluoromethyl-propyl]-1H-pyridin-2-one

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Reaction Steps

The title compound was prepared in analogy to Example 1, steps 2 to 5, from 2,4-dichlorobenzeneacetic acid methyl ester [CAS Reg. No. 91361-41-0] and 2-benzyloxy-isonicotinic acid (which was made as described below from 2-chloro isonicotinic acid), leading to 2-(2-benzyloxy-pyridin-4-yl)-3-(2,4-dichloro-phenyl)-1,1,1-trifluoro-butan-2-ol, followed by cleavage of the benzyl protecting group by hydrogenation over Pd/C-10% (0.75 g) in ethyl actetate (150 ml). In step 4, methyl iodide was used as an alkylating agent and the improved procedure described in example 117 was used. MS (m/e)=364.0 [MH+].

Provenance & Evidence