Regiodivergent Stereoselective Access to Fused Alkylideneazetidines
作者:Arif Music、Andreas N. Baumann、Michael Eisold、Dorian Didier
DOI:10.1021/acs.joc.7b02786
日期:2018.1.19
simplification of 2H-azetine synthesis, a regiodivergent approach to fused 2- and 3-alkylideneazetines was designed via the intermediate formation of unprecedented vinylazetine structures. Concise sequences to the latter are described from which an expected unsaturated fused ring system was isolated with very high yields and regio- and stereoselectivities by [4 + 2] cycloadditions.
Stereoselective Sequence toward Biologically Active Fused Alkylidenecyclobutanes
作者:Andreas N. Baumann、Michael Eisold、Dorian Didier
DOI:10.1021/acs.orglett.7b00724
日期:2017.4.21
Combining an efficient preparation of cyclobutenylmetal species, high-yielding cross-coupling reactions, and highly diastereoselective [4 + 2]-cycloaddition led to opening a newroute toward the synthesis of fused alkylidenecyclobutanes containing up to five consecutive stereocenters. New complex architectures, analogues to protoilludane skeletons, were obtained in a very efficient manner and with