Enantioselective Ethylation of Aldehydes with Diethylzinc Catalyzed by Chiral Sulfoxide
碩士 === 國立中央大學 === 化學學系 === 104 === Chiral sulfoxide cis-2 and trans-2 were synthesized from commercially available 5-bromovalerate through a five-step synthetic route. We demonstrated the application of these chiral sulfoxide catalysts in asymmetric addition of diethylzinc to benzaldehyde and also...
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ndltd-TW-104NCU050650042019-05-15T22:34:53Z http://ndltd.ncl.edu.tw/handle/d9ns2q Enantioselective Ethylation of Aldehydes with Diethylzinc Catalyzed by Chiral Sulfoxide 以手性亞碸催化劑進行醛的不對稱乙基化反應之研究 Chih-Cheng Chen 陳致誠 碩士 國立中央大學 化學學系 104 Chiral sulfoxide cis-2 and trans-2 were synthesized from commercially available 5-bromovalerate through a five-step synthetic route. We demonstrated the application of these chiral sulfoxide catalysts in asymmetric addition of diethylzinc to benzaldehyde and also investigated the promotion of the catalytic process by acid additives. Surprisingly, when we added 50 mol% of 4-methoxybenzoic acid, the yield and enantioselectivity were improved. In addition, the stereochemistry of product changed from S to R, Finally, We also investigated asymmetric addition of diethylzinc to different aromatic aldehydes. Rong-Jie Chein Fa-Kuen Shieh 陳榮傑 謝發坤 2015 學位論文 ; thesis 132 zh-TW |
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碩士 === 國立中央大學 === 化學學系 === 104 === Chiral sulfoxide cis-2 and trans-2 were synthesized from commercially available 5-bromovalerate through a five-step synthetic route. We demonstrated the application of these chiral sulfoxide catalysts in asymmetric addition of diethylzinc to benzaldehyde and also investigated the promotion of the catalytic process by acid additives. Surprisingly, when we added 50 mol% of 4-methoxybenzoic acid, the yield and enantioselectivity were improved. In addition, the stereochemistry of product changed from S to R, Finally, We also investigated asymmetric addition of diethylzinc to different aromatic aldehydes.
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author2 |
Rong-Jie Chein |
author_facet |
Rong-Jie Chein Chih-Cheng Chen 陳致誠 |
author |
Chih-Cheng Chen 陳致誠 |
spellingShingle |
Chih-Cheng Chen 陳致誠 Enantioselective Ethylation of Aldehydes with Diethylzinc Catalyzed by Chiral Sulfoxide |
author_sort |
Chih-Cheng Chen |
title |
Enantioselective Ethylation of Aldehydes with Diethylzinc Catalyzed by Chiral Sulfoxide |
title_short |
Enantioselective Ethylation of Aldehydes with Diethylzinc Catalyzed by Chiral Sulfoxide |
title_full |
Enantioselective Ethylation of Aldehydes with Diethylzinc Catalyzed by Chiral Sulfoxide |
title_fullStr |
Enantioselective Ethylation of Aldehydes with Diethylzinc Catalyzed by Chiral Sulfoxide |
title_full_unstemmed |
Enantioselective Ethylation of Aldehydes with Diethylzinc Catalyzed by Chiral Sulfoxide |
title_sort |
enantioselective ethylation of aldehydes with diethylzinc catalyzed by chiral sulfoxide |
publishDate |
2015 |
url |
http://ndltd.ncl.edu.tw/handle/d9ns2q |
work_keys_str_mv |
AT chihchengchen enantioselectiveethylationofaldehydeswithdiethylzinccatalyzedbychiralsulfoxide AT chénzhìchéng enantioselectiveethylationofaldehydeswithdiethylzinccatalyzedbychiralsulfoxide AT chihchengchen yǐshǒuxìngyàfēngcuīhuàjìjìnxíngquándebùduìchēngyǐjīhuàfǎnyīngzhīyánjiū AT chénzhìchéng yǐshǒuxìngyàfēngcuīhuàjìjìnxíngquándebùduìchēngyǐjīhuàfǎnyīngzhīyánjiū |
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1719133374800461824 |