Asymmetric Michael addition of chiral enaminoesters to phenyl vinyl sulfone and 1,1-bis(phenylsulfonyl)ethylene
摘要:
Enaminoester (S)-9 was added to phenyl vinyl sulfone, leading to adduct (S)-10. In contrast addition of 9 to 1,1-bis(phenylsulfonyl) ethylene gave (R)-16.
Asymmetric Michael addition of chiral enaminoesters to phenyl vinyl sulfone and 1,1-bis(phenylsulfonyl)ethylene
摘要:
Enaminoester (S)-9 was added to phenyl vinyl sulfone, leading to adduct (S)-10. In contrast addition of 9 to 1,1-bis(phenylsulfonyl) ethylene gave (R)-16.
An efficient synthesis of chiral pyrrolidine and piperidine enamino esters is described in one step from methyl halogeno alcynoate and (S)-1-phenylethylamine or (S)-phenylglycinol.