Bifunctional catalysts stabilized on nanocrystalline magnesium oxide for one-pot synthesis of chiral diols

被引：28

作者：

Choudary, BM ^{[1
]}

Jyothi, K ^{[1
]}

Roy, M ^{[1
]}

Kantam, ML ^{[1
]}

Sreedhar, B ^{[1
]}

机构：

[1] Indian Inst Chem Technol, Hyderabad 500007, Andhra Pradesh, India

来源：

ADVANCED SYNTHESIS & CATALYSIS | 2004年 / 346卷 / 12期

关键词：

asymmetric synthesis; bifunctional catalysis; chiral diols; counterionic stabilization; nanocrystalline magnesium oxide;

D O I：

10.1002/adsc.200404112

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

New bifunctional catalysts composed of PdCl42-, OsO42- and OsO42-, WO42- designed and prepared by a counterionic stabilization technique involving the reactions of Na2PdCl4-K2OsO4 and K2OsO4-Na2WO4 with nanocrystalline MgO are well characterized. These bifunctional catalysts, NAP-Mg-PdOs and NAP-Mg-OsW perform tandem Heck asymmetric dihydroxylation and asymmetric dihydroxylation-N-oxidation reactions, respectively, in the presence of the chiral ligand 1,4-bis(9-o-dihydroquinidinyl)phthalazine [(DHQD)(2)PHAL] in a single pot. It is quite impressive to note that H,02 is used as a terminal oxidant to provide N-methylmorpholine N-oxide (NMO) in situ by the oxidation of N-methylmorpholine (NMM) in the asymmetric dihydroxylation-N-oxidation catalyzed by NAP-Mg-OsW.

引用

页码：1471 / 1480

页数：10

共 65 条

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