Synthesis of Hemitectol, Tectol, and Tecomaquinone I
作者:Brent Copp、Melissa Cadelis、David Barker
DOI:10.1055/s-0032-1317541
日期:——
The first total syntheses of Tectona grandis (teak) natural products hemitectol and tectol are described. The observation of spontaneous dimerisation of hemitectol to tectol suggests the monomer is the true natural product and that the dimer is an artifact of isolation.
Direct Allylation of Quinones with Allylboronates
作者:Hong-Ping Deng、Dong Wang、Kálmán J. Szabó
DOI:10.1021/acs.joc.5b00264
日期:2015.3.20
Allylboronates undergo C–H allylation of unsubstituted or monosubstituted benzoquinone and naphthoquinone substrates. In the case of 2,5- or 2,6-disubstituted quinones addition involving the substituted carbon takes place. Allylation with stereodefined allylboronates occurs with retention of the configuration.