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Addition of the lithium ester enolates to 1-chlorovinyl p-tolyl sulfoxides, which were synthesized from chloromethyl p-tolyl sulfoxide and ketones or aldehydes, gave esters having a tertiary or a quaternary carbon at the 3-position, and chlorine and sulfinyl groups at the 4-position in high to quantitative yields. The adducts were converted to various esters having methyl, formyl, and hydroxycarbonyl...
Addition of the lithium enolate of acetic acid esters to 1-chlorovinyl p-tolyl sulfoxides, which were derived from ketones and chloromethyl p-tolyl sulfoxide in three steps in good yields, gave carboxylic acid esters having a quaternary carbon at the 3-position, and chlorine and sulfinyl groups at the 4-position in high yields. Various kinds of functionalized carboxylic acid derivatives, including...
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