Acid-Mediated Conversion of Methylene-Interrupted Bisepoxides to Tetrahydrofurans: A Biomimetic Transformation
摘要:
The acid-mediated transformation of syn and anti methylene interrupted cis,cis and cis,trans bisepoxides to tetrahydrofurans is high yielding, and demonstrates both regioselectivity and stereoselectivity. Trans,trans methylene interrupted bisepoxides do not yield tetrahydrofurans under the same conditions.
Biocatalytic Asymmetric Rearrangement of a Methylene-Interrupted Bis-epoxide: Simultaneous Control of Four Asymmetric Centers Through a Biomimetic Reaction Cascade
作者:Silvia M. Glueck、Walter M. F. Fabian、Kurt Faber、Sandra F. Mayer
DOI:10.1002/chem.200400061
日期:2004.7.19
Asymmetric enzyme-catalyzed hydrolysis of methylene-interrupted bis-epoxides 1 a and 1 b catalyzed by bacterial epoxide hydrolases furnished tetrahydrofuran derivatives 2 a and 2 b through a hydrolysis-rearrangement cascade. Whereas racemic bis-oxiranes 1 b-d underwent kinetic resolution with moderate stereoselectivities to yield products with up to 92 % ee and 66 % de: meso-bis-oxirane cis,cis-1 a
Acid-Mediated Conversion of Methylene-Interrupted Bisepoxides to Tetrahydrofurans: A Biomimetic Transformation
作者:Robert J. Capon、Russell A. Barrow
DOI:10.1021/jo971147k
日期:1998.1.1
The acid-mediated transformation of syn and anti methylene interrupted cis,cis and cis,trans bisepoxides to tetrahydrofurans is high yielding, and demonstrates both regioselectivity and stereoselectivity. Trans,trans methylene interrupted bisepoxides do not yield tetrahydrofurans under the same conditions.