Homochiral 1-methoxy-3-sulfinyl-1,3-butadienes derived from 10-mercaptoisoborneol
摘要:
Simple syntheses of homochiral (Z)- and (E)-1-methoxy-3-alkylsulfinyl-1,3-butadienes were provided by the cycloaddition of (IS)-d-isobornyl-10-sulfenic acid to (Z)- and (E)-1-methoxybut-1-en-3-yne. Asymmetric induction pertained for such cycloadditions, which also provided homochiral dienes from 1-ethynylcyclohex-1-ene.
Synthesis and Asymmetric Diels−Alder Reactions of Enantiopure 3-(Alkylsulfinyl)-1-methoxy-1,3-butadienes
作者:Maria C. Aversa、Anna Barattucci、Paola Bonaccorsi、Placido Giannetto、David Neville Jones
DOI:10.1021/jo962286p
日期:1997.6.1
Simple syntheses of enantiopure (E)- and (Z)-3-(alkylsulfinyl)-1-methoxy-1,3-butadienes 2and 3 were provided by the addition of (1S)-isoborneol-10-sulfenic and (S)-phenyl-2-hydroxyethanesulfenic acids 8 to (E)- and (Z)-1-methoxybut-1-en-3-ynes (9) and (10). These additions proceeded with asymmetric induction, the extent of which depended upon the nature of the chiral hydroxyalkyl group. Cycloadditions