Studies on catalytic enantioselective protonation
Studies on catalytic enantioselective protonation
批准号:
08640699
负责人:
NAKAMURA Yutaka
金额:
$1.47万
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research (C)
财政年份:
1996
资助国家:
日本
项目状态:
已结题
起止时间:
1996 至 1998
中文摘要
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英文摘要
(1) Enantioselectivities near maximum values were obtained in the catalytic enantioselective protonation of samarium enolate by a rapid addition of a fluorous achiral alcohol (Rfh_33C-OH) to the reaction mixture : for a nonfluorous chiral diol (DHPEX) in Rfh_3C-OH/THF solid-liquid biphase system and for a fluorous chiral alcohol in THF/FC-72 liquid-liquid biphase system.(2) High enantioselectivity (up to 94% ee) has been achieved in the enantioselective protonation of samarium enolates generated by SmI_2-mediated reductive elimination of alpha-hetero-substituted ketones using C_2-symmetric chiral diol as a proton source.
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Yutaka Nakamura: "Enantioselective Protonation of Samarium Enolates Derived from alpha-heterosubstituted Ketones and Lactones by SmI_2-Mediated Reduction" Tetrahedron. 55(15). 4595-4620 (1999)
Yutaka Nakamura:“通过 SmI_2 介导的还原从 α-杂取代的酮和内酯衍生的钐烯醇化物的对映选择性质子化”四面体。
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影响因子:
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作者:
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通讯作者:
Yutaka Nakamura: "Enantioselective Protonation of Samarium Enolates Derived from α-heterosubstituted Ketones and Lactones by SmI_2-Mediated Reduction" Tetrahedron. 55. 4595-4620 (1999)
Yutaka Nakamura:“通过 SmI_2 介导的还原从 α-杂取代酮和内酯衍生的钐烯醇化物的对映选择性质子化”四面体。
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影响因子:
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作者:
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通讯作者:
Seiji Takeuchi: "Catalytic Enantioselective Protonation of a Samarium Enolate with Fluorous Chiral and Achiral Proton Sources in Fluorous Biphasic Systems" Tetrahedron Lett. 39(47). 8691-8694 (1998)
Seiji Takeuchi:“含氟双相系统中含氟手性和非手性质子源对烯醇钐的催化对映选择性质子化”四面体莱特。
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发表时间:
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作者:
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通讯作者:
Seiji Takeuchi: "Catalytic Enantioselective Protonation of a Samarium Enolate with Fluorous Chiral and Achiral Proton Sources in Fluorous Biphasic Systems" Tetrahedron Letters. 39. 8691-8694 (1998)
Seiji Takeuchi:“含氟双相系统中含氟手性和非手性质子源对烯醇钐的催化对映选择性质子化”四面体快报。
DOI:
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发表时间:
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作者:
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通讯作者:
Seiji Takeuchi et al: "Catalytic Enantioselective Protonation of a Samarium Enolate with Fluorous Chiral and Achiral Proton Sources in Fluorous Biphasic Systems" Tetrahedron Letters. 39(47). 8691-8694 (1998)
Seiji Takeuchi 等人:“含氟双相系统中含氟手性和非手性质子源对烯醇化钐的催化对映选择性质子化”四面体快报。
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