Jm. Williams et al., A NEW GENERAL-METHOD FOR PREPARATION OF N-METHOXY-N-METHYLAMIDES - APPLICATION IN DIRECT CONVERSION OF AN ESTER TO A KETONE, Tetrahedron letters, 36(31), 1995, pp. 5461-5464
The reaction of an ester with N,O-dimethylhydroxylamine and a suitable
organomagnesium reagent or lithium amide base provides a general meth
od for the preparation of N-methoxy-N-methylamides. Application in the
direct conversion of a highly hindered ester to a ketone, the azaster
oid 5 alpha-reductase inhibitor MK-0434, is described.