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).
[EN] PROCESS FOR SYNTHESIS OF PICOLINAMIDES<br/>[FR] PROCÉDÉ DE SYNTHÈSE DE PICOLINAMIDES
申请人:DOW AGROSCIENCES LLC
公开号:WO2021076681A1
公开(公告)日:2021-04-22
The present technology relates to processes, mixtures and intermediates useful for making picolinamide fungicides. The picolinamide compounds are prepared by processes that include coupling together a 4-methoxy-3-acyloxypicolinic acid with key 2-amino-L-alaninate esters derived from substituted 2-phenylethanols.
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。
PROCESS FOR SYNTHESIS OF PICOLINAMIDES
申请人:CORTEVA AGRISCIENCE LLC
公开号:US20220411375A1
公开(公告)日:2022-12-29
The present technology relates to processes, mixtures and intermediates useful for making picolinamide fungicides. The picolinamide compounds are prepared by processes that include coupling together a 4-methoxy-3-acyloxypicolinic acid with key 2-amino-L-alaninate esters derived from substituted 2-phenylethanols.
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.