Facile construction of 3-hydroxyphenanthrene-1,4-diones: key intermediates to tanshinone I and its A-ring-modified analogue
作者:Mingkun Jiao、Chunyong Ding、Ao Zhang
DOI:10.1016/j.tet.2014.03.019
日期:2014.5
key precursor for total synthesis of tanshinone I. This tandem process includes decarboxylative radicalalkylation, intramolecular C–H arylation and one-pot O-demethylation and aromatization. Variously substituted phenylpropanoic acids were well tolerated in this approach, and synthesis of tanshinone I (1) was finally successful in six straight steps in 19% overall yields from commercially available