α‐Methylene organoboronic esters: These compounds are prepared in a catalytic fashion for precursor boronic esters by a Pd‐catalyzed rearrangement of the derived "ate" complexes.
Abstract
Organoboron "ate" complexes undergo a net vinyl insertion reaction to give 1,1‐disubstituted alkenyl boronic esters when treated with stoichiometric allyl acetate and a palladium catalyst. Reactions that employ vinyllithium afforded good to excellent yields after one hour, while reactions that employ vinylmagnesium chloride furnished modest to good yields after 18 hours.
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Medicine by Alexandros G. Sfakianakis,Anapafseos 5 Agios Nikolaos 72100 Crete Greece,00302841026182,00306932607174,alsfakia@gmail.com,