An indenone synthesis involving a new aminotransfer reaction and its application to dibenzopentalene synthesis

K Katsumoto, C Kitamura…

Index: Katsumoto, Kenta; Kitamura, Chitoshi; Kawase, Takeshi European Journal of Organic Chemistry, 2011 , # 25 p. 4885 - 4891

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Citation Number: 7

Abstract

Abstract o-(Phenylethynyl) phenyllithiums, generated by treatment of o-(phenylethynyl) bromobenzenes with tBuLi, were quenched with N, N-dimethylcarboamides to afford various 2-phenylindenone derivatives in moderate to good yields upon acidic workup. The choice of lithiation reagents was critical. When n-butyllithium was used the yields were reduced. The N-alkyl groups in the carboamides were also important: quenching with N, N- ...