カルボジイミド型脱水縮合剤を用いるα,β-不飽和カルボン酸の脱共役エステル化反応
書誌事項
- タイトル別名
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- Deconjugative Esterification of &alpha,&beta-Unsaturated Carboxylic Acids through Carbodiimide Coupling
説明
We have disclosed the deconjugative esterification of &alpha,&beta-unsaturated carboxylic acids through 1,3-dicyclohexylcarbodiimide (DCC) coupling. In the presence of trimethylamine hydrochloride and N,N-dimethylethylamine, an esterification of (E)-5-phenylpent-2-enoic acid and isopropanol through DCC coupling in CH2Cl2 at 50ºC afforded &beta,&gamma-unsaturated ester as a major product with a ratio of 91:9. The tendency toward deconjugation in the esterification seemed to depend on the bulkiness of alcohols. The reaction probably involves the generation of a conjugated ketene intermediate, which is converted into the corresponding &beta,&gamma-unsaturated esters by treatment with alcohols.
収録刊行物
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- 反応と合成の進歩シンポジウム 発表要旨概要
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反応と合成の進歩シンポジウム 発表要旨概要 35 (0), 108-108, 2009
日本薬学会化学系薬学部会
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詳細情報 詳細情報について
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- CRID
- 1390001205635773568
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- NII論文ID
- 130006998329
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可