Herein we describe a novel approach to the asymmetric synthesis of N-t
-Boc-phenylsarcosine. The synthesis involves the enantioselective depr
otonation at the benzylic position of N-t-Boc-N-methylbenzylamine 2 us
ing the chiral complex s-BuLi/(-) sparteine 1 followed by a stereosele
ctive carboxylation.