Synthesis of Chiral Pyrrolidine Derivatives from (S)-Pyroglutamic Acid. II. 4-(Hydroxymethyl)-3-azabicyclo(3.1.0)hexan-2-ones and 5,5-Disubstituted 2-Pyrrolidinones.
Synthesis of Chiral Pyrrolidine Derivatives from (S)-Pyroglutamic Acid. II. 4-(Hydroxymethyl)-3-azabicyclo(3.1.0)hexan-2-ones and 5,5-Disubstituted 2-Pyrrolidinones.
A New Approach to Chiral 5,5-Disubstituted 2-Pyrrolidinones form (S)-Pyroglutamic Acid
作者:Tatsuo Nagasaka、Tomoko Imai
DOI:10.3987/com-95-7159
日期:——
Two enantiomers of 5,5-disubstituted 2-pyrrolidinones with the certain configurations were synthesized, starting from (S)-pyroglutamic acid, via the bicyclic lactam, (2R, 5S)-2-aryl-1-aza-3-oxabicyclo[3.3.0]oct-5-en-7-one (6).
Synthesis of Chiral Pyrrolidine Derivatives from (S)-Pyroglutamic Acid. II. 4-(Hydroxymethyl)-3-azabicyclo(3.1.0)hexan-2-ones and 5,5-Disubstituted 2-Pyrrolidinones.
作者:Tatsuo NAGASAKA、Tomoko IMAI
DOI:10.1248/cpb.45.36
日期:——
The chiral pyrrolidine derivatives, 4-(hydroxymethyl)-3-azabicyclo[3.1.0]hexan-2-ones (10 and 11) and 5, 5-disubstituted 2-pyrrolidinones (20, 21 and 22), were synthesized starting from (S)-pyroglutamic acid and absolute configuration determination was made based on the 1H-NMR spectra of the bicyclic lactam intermediates.