SYNTHESIS OF (3S)-2,5-DIETHOXY-3,6-DIHYDRO-3-ISOPROPYL-6-METHYLSULFANYLPYRAZINES AND STEREOSELECTIVITY IN ALKYLATION OF THE ANIONS

摘要

The introduction of a sulfur function into Schollkopf's bislactim ether was carried out to synthesize the diastereomers of (3S)-2,5-diethoxy-3,6-dihydro-3-isopropyl-6-methylsulfanylpyrazine. Stereoselectivity in the alkylation of the anions derived from those compounds was examined as a basic study of the synthesis of chiral α-sulfanylamino acids.