1-Ethyl-3,3-bis(phenylmethyl)-5-{[(triphenylmethyl)oxy]methyl}-2-pyrrolidinone → N-[(2-chloro-4-fluorophenyl)methyl]-1-ethyl-5-oxo-4,4-bis(phenylmethyl)prolinamide

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Reaction Steps

N-[(2-chloro-4-fluorophenyl)methyl]-1-ethyl-5-oxo-4,4-bis(phenylmethyl)prolinamide was prepared in a manner analogous to that described above for the synthesis of N-[(2-chloro-4-fluorophenyl)methyl]-1-ethyl-4,4-dimethyl-5-oxoprolinamide (E130) but using 1-ethyl-5-oxo-4,4-bis(phenylmethyl)proline in the place of 1-ethyl-4,4-dimethyl-5-oxoproline. 1-Ethyl-5-oxo-4,4-bis(phenylmethyl)proline was prepared in a manner analogous to that described for 1-ethyl-4,4-dimethyl-5-oxoproline in example 130 above but using 1-ethyl-3,3-bis(phenylmethyl)-5-{[(triphenylmethyl)oxy]methyl}-2-pyrrolidinone (isolated as a side-product in method B, Example 37) in place of 1-ethyl-3,3-dimethyl-5-{[(triphenylmethyl)oxy]methyl}-2-pyrrolidinone.

Provenance & Evidence