C. Agami et al., HETEROCYCLIZATIONS OF N-BOC DERIVATIVES OF BETA-AMINO ALCOHOLS AND THIO ANALOGS - AN UNUSUAL CASE OF THE THORPE-INGOLD EFFECT, Bulletin de la Societe chimique de France, 132(8), 1995, pp. 808-814
Enantiopure oxazolidin-2-ones were synthesized from chiral N-Boc beta-
aminoalcohols which underwent a cyclization upon treatment with tosyl
chloride. This reaction was strongly accelerated in the case of carbam
ates derived from N-methylated amines. A similar heterocyclization was
observed with dithiocarbamates, ie sulfur analogs of carbamates. The
rate enhancement due to the nitrogen substitution was studied by AM1 c
alculations.