Synthesis of Biaryls, Fluorenones,
Cyclopenta[<i>def</i>]phenanthren-4-ones, and
Benzophenones Based on Formal [3+3] Cyclocondensations
of 1,3-Bis(silyloxy)buta-1,3-dienes with 3-(Silyloxy)-2-en-1-ones
prepared by cyclization of 3-aryl-3-(silyloxy)-2-en-1-ones with 1,3-bis(silyloxy)buta-1,3-dienes and subsequent intramolecular Friedel-Crafts acylation of the 6-arylsalicylates thus formed. In this context, the synthesis of novel cyclopenta[def]phenanthren-4-ones is reported. In addition, the synthesis of functionalized benzophenones is reported. cyclizations - fluorenones - regioselectivity - silyl
The present invention provides methods for the use of compounds having formula (I) in the treatment of various disorders including inflammatory or autoimmune disorders, and disorders involving malignancy or increased angiogenesis, wherein R
1
-R
11
, t, X, Y, Z, and n are as defined herein.