Use of a Sonogashira−Acetylide Coupling Strategy for the Synthesis of the Aromatic Spiroketal Skeleton of γ-Rubromycin
作者:Kit Y. Tsang、Margaret A. Brimble、John B. Bremner
DOI:10.1021/ol035723c
日期:2003.11.1
The synthesis of the fused aromatic spiroketal core of I-rubromycin is described via addition of an aryl acetylide fragment to an aryl acetaldehyde fragment. In turn, the aryl acetylene precursor was readily prepared with use of a Sonogashira reaction.
Synthesis of aromatic spiroacetals related to γ-rubromycin based on a 3H-spiro[1-benzofuran-2,2′-chromane] skeleton
作者:Kit Yee Tsang、Margaret A. Brimble
DOI:10.1016/j.tet.2007.02.033
日期:2007.6
The synthesis of a series of aromatic 5,6-benzannelated and naphthyl-benzannelated spiroacetalsrelated to the spiroacetalunit present in the quinonoid antibiotic γ-rubromycin is reported. The key steps include the use of Sonogashira coupling to construct an aryl acetylene that is coupled to an aryl aldehyde forming a propargyl alcohol intermediate. Hydrogenation of the resultant alkynol followed