A Multicatalyst System for the One‐Pot Desymmetrization/Oxidation of
<i>meso</i>
‐1,2‐Alkane Diols
作者:Christian E. Müller、Radim Hrdina、Raffael C. Wende、Peter R. Schreiner
DOI:10.1002/chem.201100498
日期:2011.5.27
Two is better than one: We demonstrate the viability of an organocatalytic reaction sequence along a short peptide backbone that carries two independent catalytic functionalities, which allow the rapid, one‐pot acylative desymmetrization and oxidation of meso‐alkane‐1,2‐diols to the corresponding acetylated acetoins with good yields and enantioselectivities (see scheme).
Exceedingly Fast Oxygen Atom Transfer to Olefins via a Catalytically Competent Nonheme Iron Species
作者:Joan Serrano-Plana、Almudena Aguinaco、Raquel Belda、Enrique García-España、Manuel G. Basallote、Anna Company、Miquel Costas
DOI:10.1002/anie.201601396
日期:2016.5.17
The reaction of [Fe(CF3SO3)2(PyNMe3)] with excess peracetic acid at −40 °C leads to the accumulation of a metastable compound that exists as a pair of electromeric species, [FeIII(OOAc)(PyNMe3)]2+ and [FeV(O)(OAc)(PyNMe3)]2+, in fast equilibrium. Stopped‐flow UV/Vis analysis confirmed that oxygen atom transfer (OAT) from these electromeric species to olefinic substrates is exceedingly fast, forming
A One-Step Procedure for the Monoacylation of Symmetrical 1,2-Diols
作者:Paul A. Clarke、Nadim E. Kayaleh、Martin A. Smith、James R. Baker、Stephan J. Bird、Chuen Chan
DOI:10.1021/jo0257041
日期:2002.7.1
A series of lanthanide (III) salts have been shown to catalyze the monoacylation of symmetrical 1,2-diols by carboxylic acid anhydrides with surprisingly high selectivity.
已显示一系列镧系元素(III)盐以惊人的高选择性催化羧酸酐对对称1,2-二醇的单酰化反应。
Direct one step mono-functionalisation of symmetrical 1,2-diols
作者:Paul A Clarke、Robert A Holton、Nadim E Kayaleh
DOI:10.1016/s0040-4039(00)00224-0
日期:2000.4
The mono-functionalisation of meso- and C-2-symmetric diols has been achieved via the use of a new lanthanide(III) chloride catalysed acylation reaction. (C) 2000 Elsevier Science Ltd. All rights reserved.
One-Pot Desymmetrization of<i>meso</i>-1,2-Hydrocarbon Diols through Acylation and Oxidation
作者:Christian E. Müller、Daniela Zell、Peter R. Schreiner
DOI:10.1002/chem.200901711
日期:2009.9.28
Avoid racemization! Short lipophilic oligopeptides utilizing nucleophilic N‐π‐methyl histidine residues catalyze the desymmetrization of meso‐1,2‐diols with enantiomeric ratios of up to 94:6. Direct one‐potoxidation, which avoids the well‐known racemization of the monoacylated product, directly leads to α‐acetoxy ketones with enantiomeric ratios of up to 97:3 and 97 % yield.