Enol Phosphinates and Phosphonates: Practical Electrophiles for Cross-Coupling Strategies
作者:Patrick Steel、Tom Woods
DOI:10.1055/s-0029-1217067
日期:2009.11
Enol phosphinates and phosphonates can be readily prepared from simple lactams in high yields and are both stable and storable. Both these substrates can be employed successfully in homogeneous Suzuki-Miyaura and Stille cross-couplings protocols. Additionally, the phosphonate group can be immobilised on a phenol-on-polystyrene resin and utilised in a simple diversity linker strategy in which the coupled
Phosphinates as new electrophilic partners for cross-coupling reactions
作者:Jun Guo、John D. Harling、Patrick G. Steel、Tom M. Woods
DOI:10.1039/b809577a
日期:——
The use of enol phosphinates as electrophiles for cross-coupling reactions has been explored. Both boronic acids (Suzuki–Miyaura reaction) and stannanes (Stille reaction) couple efficiently with lactam derived phosphinates.
Exo-Selective Diels−Alder Reactions of Vinylazepines. Origin of Divergent Stereoselectivity in Diels−Alder Reactions of Vinylazepines, Vinylpiperideines, and Vinylcycloalkenes
作者:Brant Boren、Jennifer S. Hirschi、Joseph H. Reibenspies、Matthew D. Tallant、Daniel A. Singleton、Gary A. Sulikowski
DOI:10.1021/jo034462h
日期:2003.11.1
Diels-Alderreactions of vinylazepines with N-phenylmaleimide afforded exclusively the exo cycloadduct, while high endo stereoselectivity was observed, as previously reported, in analogous reactions of vinylpiperideines. This curious contrast was confirmed by X-ray analysis of cycloadducts not susceptible to epimerization. The stereoselectivity of Diels-Alderreactions of vinylazepines, vinylpiperideines