Synthesis of Diaryl Diselenides Having Chiral Pyrrolidine Rings with C<sub>2</sub>Symmetry. Their Application to the Asymmetric Methoxyselenenylation of<i>trans</i>-β-Methylstyrenes
作者:Ken-ichi Fujita、Michio Iwaoka、Shuji Tomoda
DOI:10.1246/cl.1994.923
日期:1994.5
Optically active diaryl diselenides carrying C2 symmetrical chiral pyrrolidines are synthesized by the condensation between 2,2′-diselenobis(benzyl chloride) derivatives and chiral pyrrolidines and are applied to methoxyselenenylation of trans-olefins. The observed diastereomeric excess (d.e.) is up to 60%.
Synthesis of enantiomerically pure (2R, 5R) disubstituted pyrrolidines from D-mannitol
作者:M. Marzi、P. Minetti、D. Misiti
DOI:10.1016/s0040-4020(01)89042-6
日期:——
Pyrrolidines and are obtained from D-Mannitol, giving good total yields and in an enantiomericallypure form. Some comments and studies regarding pyrrolidine ring closure (key step) are also reported.