Palladium-Catalyzed Addition of Mono- and Dicarbonyl Compounds to Conjugated Dienes
作者:Andreas Leitner、Jens Larsen、Christian Steffens、John F. Hartwig
DOI:10.1021/jo0490999
日期:2004.10.1
cyanoesters, malononitrile, and α-sulfonyl esters. Reactions of these substrates with both cyclic and acyclic dienes are reported. Reactions catalyzed by complexes of nonracemic chiral ligands were also conducted, and the first enantioselective version of this reaction was achieved with a Josiphos ligand with enantioselectivities up to 81%.
Atom economy. A simple Pd catalyzed addition of pronucleophiles with dienes
作者:Barry M. Trost、Lin Zhi
DOI:10.1016/s0040-4039(00)74154-2
日期:1992.3
Replacing allylic alkylations involving allylic halides, carboxylates, etc. by the simple addition of pronucleophiles to dienes enhances efficiency of use of raw materials and reduces generation of stochiometric by-products.
Sulfones as Synthetic Linchpins: Transition‐Metal‐Free sp
<sup>3</sup>
–sp
<sup>2</sup>
and sp
<sup>2</sup>
–sp
<sup>2</sup>
Cross‐Couplings Between Geminal Bis(sulfones) and Organolithium Compounds
作者:Barry M. Trost、Christopher A. Kalnmals
DOI:10.1002/chem.201800118
日期:2018.6.26
carbon of the bis(phenylsulfonyl)methyl unit to ultimately generate trisubstituted alkenes, comprising formal sp3–sp2 and sp2–sp2 cross‐couplings between organolithium reagents and bis(sulfones). This process occurs almost instantaneously at −78 °C in the absence of any transition metals. By developing this curious transformation, it has been demonstrated that bis(phenylsulfonyl)methane is a valuable