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
作者:Peter Langer、Stefanie Reim、Matthias Lau、Muhammad Adeel、Ibrar Hussain、Mirza Yawer、Abdolmajid Riahi、Zafar Ahmed、Christine Fischer、Helmut Reinke
DOI:10.1055/s-0028-1083309
日期:——
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
分四个步骤有效地制备了官能化的芴酮。1,3-双(甲硅烷氧基)丁1,3-二烯与3-(甲硅烷氧基)-2-en-1-one的[3 + 3]环化提供了水杨酸酯,将其转化为烯醇三氟甲磺酸酯。后者与芳基硼酸的Suzuki交叉偶联反应得到2-(甲氧基羰基)联芳基,其随后通过分子内Friedel-Crafts酰化作用转化为目标分子。另外,通过将3-芳基-3-(甲硅烷氧基)-2-烯-1-酮与1,3-双(甲硅烷氧基)丁烯-1,3-二烯环合,随后进行分子内弗里德尔-克拉夫茨制备1-羟基芴酮这样形成的6-芳基水杨酸酯的酰化。在这种情况下,新型环戊四烯的合成[ def] phenanthren-4-ones被报道。另外,已经报道了官能化的二苯甲酮的合成。 环化-芴酮 -区域选择性-甲硅烷基烯醇醚