Samarium diiodide promotes smooth reductive cyclizations of gamma-naphthyl-substituted ketones to afford tri- and tetracyclic compounds in high yields and with excellent stereoselectivities. Cyclic ketones furnish steroid-like compounds with "unnatural" cis/cis annulation of rings B/C/D. The remaining styrene-type double bond of ring B allows further stereoselective reactions. Cases with matched and mismatched relative configuration could be identified leading to dramatic differences in the ring closure ability.
COMPOUND FOR ORGANIC THIN FILM TRANSISTOR AND ORGANIC THIN FILM TRANSISTOR USING THE SAME
申请人:Nakano Yuki
公开号:US20110180790A1
公开(公告)日:2011-07-28
A compound for an organic thin film transistor having a structure represented by the following formula (1):
wherein at least one of R
1
to R
6
is a substituent, and the remaining R
1
to R
6
are a hydrogen atom.