... Tetrahedron. Volume 60, Issue 1, 1 January 2004, Pages 145–158. Cover image Cover image. ... Thus condensation of 2-iodo-1,1′-biphenyl to 9-fluorenone in t-BuLi/pentane solution afforded 9-(1,1′-biphenyl-2-yl)-9-H-fluoren-9-ol as an intermediate in 60% yield. ...