Conformational model for asymmetric Diels-Alder reactions with chiral dienes
作者:Craig Siegel、Edward R. Thornton
DOI:10.1016/s0040-4039(00)80722-4
日期:1988.1
characteristics of this model are that the phenylgroup is nearly perpendicular to the ester CO, i.e., the PhCCO dihedral angle is near 90°, and that the methoxygroup is close to the carbonyl oxygen. These features may have wider applications for chiral control by α-chiral ester groups in other types of reactions. Our results should renew interest in the use of chiral 1-acyloxydienes.
SIEGEL, CRAIG;THORNTON, EDWARD R., TETRAHEDRON LETT., 29,(1988) N 41, C. 5225-5228
作者:SIEGEL, CRAIG、THORNTON, EDWARD R.
DOI:——
日期:——
Diels-Alder reactions with dienes bearing a remote stereogenic center. Conformational model for diastereofacial selectivity
作者:Craig Siegel、Edward R. Thomton
DOI:10.1016/s0957-4166(00)80037-3
日期:——
resonances. Study of the Diels-Alderreactions of such chiral 1-acyloxydienes has led us to a transition structure model which uniquely explains the origin of the observed stereoselectivities and is supported by experimental evidence, including X-ray structures showing the conformations of three Diels-Alder adducts. The model may also have wider applicability in conformational analysis and control of