Reactions of 9-Phenylxanthylium Salts with Organometallic Reagents. I

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概要

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• A close examination was made on the reactions between 9-phenylxanthylium salt (I) and various Grignard reagents, such as C_6H_5MgBr, o-and p-CH_3OC_5H_4MgBr, and CH_3MgI. It was found that the 9-phenylxanthyl radical (IX) is formed in these reactions as an intermediate ; from which 9-phenyl-9-substituted xanthenes are formed. 9-Phenylxanthenes V and VIII, which are derived from IX, are formed simultaneously. The electron spin resonance spectrum of the radical IX was analyzed by the McLachlan SCF-MO computation. Mechanism of the reaction of I with Grignard reagents were discussed in detail. The reaction between II and Grignard reagents gave the products similar to those of the reaction between I and Grignard reagents. It was confirmed that radical routes are related with the reaction mechanism to a considerable extent.

• 公益社団法人日本薬学会の論文
• 1973-06-25

著者

• 水田 栄治

  Chemical Research Laboratories, Research and Development Division, Takeda Chemical Industries, Ltd.

• 水田 栄治

  武田薬品工業

• 朝日 豊

  Chemical Research Laboratories Central Research Division Takeda Chemical Industries Ltd.:(present Ad

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