A New Strategy for Stereocontrol of Cation−Olefin Cyclization. The First Chemical Emulation of the A/B-<i>trans</i>-9,10-<i>syn</i>-Folding Pathway of Steroid Biosynthesis from 2,3-Oxidosqualene
作者:E. J. Corey、Harold B. Wood
DOI:10.1021/ja9632926
日期:1996.1.1
Synthesis of liverwort sesquiterpene (−)-isocuparene (herbertene) via a Diels-Alder reaction using phenylethylamine as chiral auxiliary
作者:Motoo Tori、Takahiro Miyake、Tomonobu Hamaguchi、Masakazu Sono
DOI:10.1016/s0957-4166(97)00313-3
日期:1997.8
The imine of 2-methylcyclopentanone with (S)(-)-phenylethylamine was subjected to reaction with methyl propiolate and the product was transformed into (-)-isocuparene by use of a Diels-Alder reaction to construct the aromatic ring. (C) 1997 Elsevier Science Ltd.
Intramolecular reductive ketone–alkynoate coupling reaction promoted by (η2-propene)titanium
Intramolecular reductive coupling of cycloalkanones tethered to alkynoates in the presence of (η2-propene)titanium was successfully performed to provide hydroxy-esters in a diastereoselective manner. Subsequent lactonization afforded angularly fused unsaturated tricyclic lactones which represent relevant substructures of numerous bioactive compounds.