Conversion of 2-alkenylcyclopropylcarbene-chromium complexes to 5-alkenyl-2-cyclopentenones: A stereospecific three- to five-carbon ring expansion reaction
作者:James W. Herndon、David K. Hill、Leonard A. McMullen
DOI:10.1016/0040-4039(95)01124-z
日期:1995.8
Upon thermolysis, 2-alkenylcyclopropylcarbene-chromium complexes are converted to 5-alkenyl-2-cyclopentenones. The reaction appears to proceed with retention of configuration in the absence of stericfactors.
<scp>Pd‐Catalyzed</scp>
Asymmetric Synthesis of 3,
<scp>4‐Dihydroisoquinolinones</scp>
From
<scp>
<i>N</i>
‐Ts‐Benzamides
</scp>
and 1,
<scp>3‐Dienes</scp>
作者:Tae Kyun Kim、So Won Youn
DOI:10.1002/bkcs.12227
日期:2021.3
A Pd(II)‐catalyzed asymmetric oxidative annulation of N‐Ts‐benzamides with 1,3‐dienes using a chiral pyridine‐oxazoline‐type ligand for the regio‐ and stereoselective synthesis of chiral 3,4‐dihydroisoquinolinones has been developed.
Transition metal-free addition of ketones or nitriles to 1,3-dienes
作者:Jean-Marc Gaudin、Pascal Millet
DOI:10.1039/b715262k
日期:——
The simpler the better (or going green): The first examples of the catalytic addition of 1,3-dienes to simple ketones or nitriles are described. These reactions can be effected on a kilogram scale, representing the shortest access featuring a perfect atom economy to molecules of interest in the perfume industry.
Reactions of 1,2-dehydropyrrolidin-5-one with 1,3-dienes. Synthesis of <i>dl</i>-gephyrotoxin 223AB
作者:Oliver E. Edwards、Austin M. Greaves、Wing-Wah Sy
DOI:10.1139/v88-191
日期:1988.5.1
Evidence is presented that the regiospecific and often stereospecific pseudo-Diels–Alder reactions of 1,3-dienes with N-acyl immonium salts, derived from 5-ethoxy-2-pyrrolidinone, are stepwise reactions. 6,7-Dehydroindolizidinones, unsaturated lactam esters, and new indene and furan derivatives are described. A synthesis of dl-gephyrotoxin 223AB (indolizidine 223AB) from trans-1,3-heptadiene was achieved