Application of the lithiation–borylation reaction to the rapid and enantioselective synthesis of the bisabolane family of sesquiterpenes
作者:Varinder K. Aggarwal、Liam T. Ball、Simon Carobene、Rickki L. Connelly、Matthew J. Hesse、Benjamin M. Partridge、Philippe Roth、Stephen P. Thomas、Matthew P. Webster
DOI:10.1039/c2cc32176a
日期:——
The expedient enantioselective synthesis of 5 bisabolane sesquiterpenes has been achieved using a common, one-pot lithiation-borylation reaction of secondary benzylic carbamates and either protodeboronation or oxidation to give the natural products in fewer than 5 steps, with high yield and >94 : 6 er.
Enantioselective Total Synthesis of (−)-Curcuquinone via Regioselective Chromium-Mediated Benzannulation
作者:Ana Minatti、Karl Heinz Dötz
DOI:10.1021/jo0500939
日期:2005.4.1
A short and efficient, high-yielding enantioselective total synthesis of the marine natural product (−)-curcuquinone 1 is reported involving a regioselective [3 + 2 + 1]-benzannulation reaction as the key step. Additionally, this strategy allows the isolation of curcuhydroquinone monomethyl ether 9 as an intermediate of the benzannulation reaction and its subsequent further protection toward diversified