Synthesis and reactivity of pyrrolidinone- and piperidinone-derived enol triflates
作者:Tim Luker、Henk Hiemstra、W.Nico Speckamp
DOI:10.1016/0040-4039(96)01883-7
日期:1996.11
A high yielding route to cyclic lactam-derived enoltriflates is given along with a study of the structural features necessary for such triflates to be of useful thermal stability. Some Pd(0)-mediated coupling reactions are disclosed as well as the first functionalisation reactions of the double bond of the resulting enamide products.
Synthesis and Further Reactivity of Functionalized Lactam-Derived Enol Triflates
作者:Tim Luker、Henk Hiemstra、W. Nico Speckamp
DOI:10.1021/jo971192s
日期:1997.11.1
Pyrrolidinone- and piperidinone-derivedenoltriflates 2 were prepared in high yield (60-97%) from the corresponding lactams 1 using KHMDS and N-(5-chloro-2-pyridyl)triflimide. A structure-stability study on the less stable pyrrolidinone-derived triflates revealed that an N-tosyl group is essential, and an alpha-ethoxy substituent enhances thermal stability. Substituents at the 3- and 4-position are