Selective reductions of cyclic 1,3-diesters by using SmI_2 and H_2O

Collins K.D.; Oliveira J.M.; Guazzelli G.; Sautier B.; De Grazia S.; Matsubara H.; Helliwell M.; Procter D.J.

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Selective reductions of cyclic 1,3-diesters by using SmI_2 and H_2O

机译：通过使用SmI_2和H_2O选择性还原环状1,3-二酯

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SmI_2/H_2O reduces cyclic 1,3-diesters to 3-hydroxyacids with no over reduction. Furthermore, the reagent system is selective for cyclic 1,3-diesters over acyclic 1,3-diesters, and esters. Radicals formed by one-electron reduction of the ester carbonyl group have been exploited in intramolecular additions to alkenes. The ketal unit and the reaction temperature have a marked impact on the diastereoselectivity of the cyclizations. Cyclization cascades are possible when two alkenes are present in the starting cyclic diester and lead to the formation of two rings and four stereocenters with excellent stereocontrol.

机译：SmI_2 / H_2O可以将环状1,3-二酯还原为3-羟基酸，且不会过度还原。此外，该试剂体系对环状的1，3-二酯和非环状的1，3-二酯具有选择性。通过单电子还原酯羰基形成的自由基已在分子内加成烯烃中得到利用。缩酮单元和反应温度对环化的非对映选择性具有显着影响。当起始环二酯中存在两个烯烃并导致形成两个具有良好立体控制性的环和四个立体中心时，可能会发生级联级联反应。

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来源
《Chemistry: A European journal》 |2010年第33期|共10页
作者
Collins K.D.; Oliveira J.M.; Guazzelli G.; Sautier B.; De Grazia S.; Matsubara H.; Helliwell M.; Procter D.J.;
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正文语种 eng
中图分类应用化学;
关键词
Chemoselectivity; Cyclization; Radical reactions; Reduction; Samarium;

机译：化学选择性;环化;自由基反应;还原;Sa;

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1. Selective reductions of cyclic 1,3-diesters by using SmI_2 and H_2O [J] . Collins K.D., Oliveira J.M., Guazzelli G., Chemistry: A European journal . 2010,第33期

机译：通过使用SmI_2和H_2O选择性还原环状1,3-二酯
2. Selective Reductions of Cyclic 1,3-Diesters Using Sml_2 and H_2O [J] . Giuditta Guazzelli, Sara De Grazia, Karl D. Collins, Journal of the American Chemical Society . 2009,第21期

机译：使用Sml_2和H_2O选择性还原环状1,3-二酯
3. Selective Reductions of Cyclic 1,3-Diesters by Using SmI₂ and H₂O [J] . Karl D. Collins, Juliana M. Oliveira, Giuditta Guazzelli Dr., Chemistry - A European Journal . 2010,第33期

机译：SmI _{2 和H _{2 O选择性还原环状1,3-二酯}}
4. Selective CO_2 Reduction Conjugated with H_2O Oxidation Utilizing Semiconductor/Metal-Complex Hybrid Photocatalysts [C] . T. Morikawa, S. Sato, T. Arai, International Conference on Solar Chemical Energy Storage . 2013

机译：利用半导体/金属复合杂交光催化剂与H_2O氧化结合的选择性CO_2减少
5. The chemistry of novel cyclic diesters: Dialkoxy disulfide, thionosulfite and carbonate. [D] . Eghbali, Nicolas Dara. 2007

机译：新型环状二酯的化学性质：二烷氧基二硫化物，亚硫代亚硫酸盐和碳酸盐。
6. Unprecedented selective homogeneous cobalt-catalysed reductive alkoxylation of cyclic imides under mild conditions [O] . Jose R. Cabrero-Antonino, Rosa Adam, Veronica Papa, 2017

机译：在温和条件下空前的环状酰亚胺选择性钴均相催化还原烷氧基化反应
7. Selective Reductions of Cyclic 1,3-Diesters by Using SmI2and H2O [O] . Karl D. Collins, Juliana M. Oliveira, Giuditta Guazzelli, 2010

机译：使用SMI2和H2O选择循环1,3-二酯的选择性减少
8. Hybrid selective non-catalytic reduction (sncr)/selective catalytic reduction (scr) demonstration for the removal of nox from boiler flue gases [R] . Urbas, J. B. 1999

机译：用于从锅炉烟气中去除NOx的混合选择性非催化还原（sncr）/选择性催化还原（scr）演示

Selective reductions of cyclic 1,3-diesters by using SmI_2 and H_2O

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