An efficient method for the synthesis of substituted TosMIC precursors
作者:Joseph Sisko、Mark Mellinger、Peter W. Sheldrake、Neil H. Baine
DOI:10.1016/0040-4039(96)01886-2
日期:1996.11
Substituted tosylmethyl isocyanides (TosMICs) are useful reagents for which no general method of preparation is available. We describe here a high-yielding method for the synthesis of substituted tosylmethyl formamides, which are readily converted to the corresponding isocyanides.
Reaction of phenylsulfonyl formamides, readily available in a single step from an aromatic aldehyde and sodium phenylsulfinate, with ketene diethylacetal under basic conditions gives N-formyl β-amino acid esters in good yield, which can be kinetically resolved with a lipase.