M. Tsukazaki et V. Snieckus, DIRECTED 2-METALATION OF N,N-DIETHYL O-3-(4-TRIMETHYLSILYL)PYRIDYL CARBAMATE - A SILICON PROTECTION ROUTE FOR HIGHLY SUBSTITUTED PYRIDINES, Heterocycles, 35(2), 1993, pp. 689-692
LiTMP metalation of N,N-diethyl O-3-(4-trimethylsilyl)pyridyl carbamat
e (4) followed by quenching with a number of carbon and heteroatom ele
ctrophiles affords a variety of 2-substituted derivatives (5) (Table 2
) thus providing a versatile new methodology for the synthesis of poly
substituted pyridines.