Reversal of the Regiochemistry in the Rhodium-Catalyzed [4+3] Cycloaddition between Vinyldiazoacetates and Dienes
作者:Pablo E. Guzmán、Yajing Lian、Huw M. L. Davies
DOI:10.1002/anie.201406440
日期:2014.11.24
regio‐, diastereo‐, and enantioselective [4+3] cycloadditionbetween vinylcarbenes and dienes has been achieved using the dirhodium tetracarboxylate catalyst [Rh2(S‐BTPCP)4]. This methodology provides facile access to 1,4‐cycloheptadienes that are regioisomers of those formed from the tandem cyclopropanation/Cope rearrangement reaction of vinylcarbenes with dienes.
The Facile Silylation of Aldehydes and Ketones using Trimethylsilyl Iodide: An Exceptionally Simple Procedure for the Generation of Thermodynamically Equilibrated Trimethylsilylenol Ethers
作者:R. D. Miller、D. R. Mckean
DOI:10.1055/s-1979-28817
日期:——
The Chloroazaphosphatrane Motif for Halogen Bonding in Solution