Diastereoselective Reduction of Alkenylboronic Esters as a New Method for Controlling the Stereochemistry of up to Three Adjacent Centers in Cyclic and Acyclic Molecules
摘要:
[GRAPHIC]cis-Boronates are readily available via a diastereoselective Pd-catalyzed reduction of tetrasubstituted alkenylboronic esters using H-2. Applying the reaction conditions presented to unsaturated open-chain boronic esters allows the stereochemistry of up to three adjacent centers to be controlled.
Remarkably facile and selective dehydroboration of tetramethylethylene from thexylmonoalkylboranes under the influence of triethylamine. Novel, convenient synthesis of monoalkylboranes as triethylaminates