Stereoselective synthesis of alcohols. Part LIII. (E)-γ-Alkoxyallylboronates: generation and application in intramolecular allylboration reactions
作者:Reinhard W. Hoffmann、Jochen Krüger、David Brückner
DOI:10.1039/b003551n
日期:——
subjected to the Matteson–Brown homologation with LiCH2Cl, give rise to the (E)-γ-alkoxyallylboronates 3 in good yield. This reaction sequence has been used to generate the (E)-γ-alkoxyallylboronates 14, 21, 26 and 31, which were the starting point for intramolecularallylborationreactions leading to the trans-disubstituted tetrahydropyrans 8 and 22, as well as hydrooxepans 27 and 32.