Silacycle-Templated Intramolecular Diels–Alder Cyclizations for the Diastereoselective Construction of Complex Carbon Skeletons
作者:Paul R. Carlson、Alexander S. Burns、Emily A. Shimizu、Shilin Wang、Scott D. Rychnovsky
DOI:10.1021/acs.orglett.1c00340
日期:2021.3.19
The utility of the dioxasiline ring as a π-facial directing group in the intramolecular Diels–Alder cyclization is explored. An initial investigation of substrate scope demonstrates that the rigidity of this directing group delivers robust stereocontrol across a number of substrates, affording single diastereomers in moderate to good yields. A mechanistic investigation reveals that the reactive diene
在分子内Diels–Alder环化中,探讨了dioxasiline环作为π界面导向基团的效用。对底物范围的初步研究表明,该导向基团的刚性可在多种底物上提供强大的立体控制,从而以中等至良好的收率提供单一的非对映异构体。机理研究表明,反应性二烯是通过γ脱质子,然后发生[1,5]氢化物位移而形成的。