An expeditious and enantioselective entry to the ABC ring of the quassinoid skeleton
作者:Tony K. M. Shing、Ying Tang、John F. Malone
DOI:10.1039/c39890001294
日期:——
The tricycle (5) with two trans-fused angular methyl groups is constructed from tiglic aldehyde and (S)-carvone involving a stereocontrolled aldol reaction and an endo-selective intramolecular Diels–Alder (IMDA) reaction; the stereochemistry was established by an X-ray study.
SHING, TONY K. M.;TANG, YING, TETRAHEDRON, 46,(1990) N, C. 2187-2194
作者:SHING, TONY K. M.、TANG, YING
DOI:——
日期:——
Unusual Diastereoselectivity in Intramolecular Diels−Alder Reactions of Substituted 3,5-Hexadienyl Acrylates. Preference for a Boatlike Structure of the Six-Atom Tether Due to Ester Overlap
作者:Michael E. Jung、Adrian Huang、Ted W. Johnson
DOI:10.1021/ol000104e
日期:2000.6.1
Thermolysis of the 3,5-hexadienyl acrylates (a) proceeds via the transition state E in which the connecting chain adopts a boatlike conformation due to a preference for maintaining ester overlap to afford the products b with good diastereoselectivity.
Synthetic study towards the tetracyclic quassinoid skeleton
作者:Tony K.M. Shing、Tang Ying
DOI:10.1016/s0040-4020(01)89783-0
日期:1990.1
The optically active tetracycle (6) with two trans-fused angular methyl groups is constructed from tiglic aldehyde and (S)-carvone in 9 steps involving a stereocontrolled aldol reaction and an endo-selective intramolecular Diels-Alder (IMDA) reaction.