Regiochemical control in the hemiacetalization of a dihydroxydialdehyde. An application of the use of homochiral 3-methyl-δ-butyrolactones to the construction of homochiral tripropionate units.
Regiochemical control in the hemiacetalization of a dihydroxydialdehyde. An application of the use of homochiral 3-methyl-δ-butyrolactones to the construction of homochiral tripropionate units.
Copper-Catalyzed γ-Selective and Stereospecific Allylic Alkylation of Ketene Silyl Acetals
作者:Dong Li、Hirohisa Ohmiya、Masaya Sawamura
DOI:10.1021/ja111645q
日期:2011.4.20
Copper-catalyzed allylic alkylation of ketene silyl acetals proceeded with excellent γ-E-selectivity. Efficient α-to-γ chirality transfer with anti-selectivity occurred in the reaction of enantioenriched secondary allylic phosphates, affording enantioenriched β-branched γ,δ-unsaturated esters. Excellent functional group compatibility was observed.
Applications of the 3-methyl-.gamma.-butyrolactone strategy to the synthesis of polypropionates: the Prelog-Djerassi lactonic ester, ent-invictolide, and the C19-C27 fragment of rifamycin S
作者:Frederick E. Ziegler、William T. Cain、Alyssa. Kneisley、Eugene P. Stirchak、Ronald T. Wester
DOI:10.1021/ja00224a032
日期:1988.8
3-Methyl-γ-butyrolactone as a source of 2-methyl-3-hydroxyketones and 2-methyl-1,3-diols: a synthesis of the C19C27 fragment of rifamycin S by linear iteration
作者:Frederick E. Ziegler、Alyssa Kneisley
DOI:10.1016/s0040-4039(00)95405-4
日期:1987.1
R-3-methyl-γ-butyrolactone as a template for the synthesis of (+)-invictolide
作者:Frederick E. Ziegler、Eugene P. Stirchak、Ronald T. Wester