A Fragment Based Approach toward Thia[<i>n</i>]helicenes
作者:Deepali Waghray、Wim Dehaen
DOI:10.1021/ol400825w
日期:2013.6.21
The synthesis of [9]- and [11]thiahelicenes, as well as the preparation of lower homologues such as [5]-, [6]-, and [7]thiahelicenes Is reported. Efficient palladium catalyzed coupling reactions were employed. Triorganoindium derivatives were selectively mono-cross-coupled with N-methyl-3,4-dibromomaleimide followed by Stifle coupling with the readily available building block naphthodithiophene. Oxidative photocyclization of the conjugated precursors using visible light was employed to synthesize a series of thia[n]helicenes. This modular synthetic methodology is independent of the length of the helical backbone.
WAMHOFF H.; HUPE H.-J., TETRAHEDRON LETT. <TELE-AY>, 1978, 2, 125-128
作者:WAMHOFF H.、 HUPE H.-J.
DOI:——
日期:——
Zur photoinduzierten reaktion von dihalogenmaleinimiden mit thiophen und furan