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ChemInform Abstract: Synthesis of Enantiomerically Pure Cyclopropyl Boronic Esters.

✍ Scribed by J. E. A. LUITHLE; J. PIETRUSZKA

Publisher
John Wiley and Sons
Year
2010
Weight
30 KB
Volume
29
Category
Article
ISSN
0931-7597

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✦ Synopsis

1998 organo-boron compounds, isocyclic C derivatives organo-boron compounds, isocyclic C derivatives S 0044

06 -199

Synthesis of Enantiomerically Pure Cyclopropyl Boronic Esters.

-Enantiomerically pure cyclopropyl boronic esters (V) and (VI), which are synthetic building blocks, are prepared by cyclopropanation using the diol (I) as chiral protecting group. -(LUITHLE,

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ChemInform Abstract: Diastereoselective
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Diastereoselective Synthesis of Cyclopropyl Boronic Esters. -A simple and efficient protocol for the conversion of 1-alkynes to 2-alkylcyclopropanols is described. Thus, 1-alkyne-derived alkynyl boronic esters (I) are converted to chiral tartrates (IV) and then subjected to cyclopropanation providi

Synthesis of Enantiomerically Pure cis-C
Synthesis of Enantiomerically Pure cis-Cyclopropylboronic Esters
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Highly stable, enantiomerically pure cyclopropylboronic esters are desirable building blocks for the preparation of a plethora of different cyclopropane derivatives. Whereas trans-configured compounds proved to be readily available, we herein report the first synthesis of the corresponding cis-