A Stereocontrolled, Convergent Synthesis of Hydroxyethylene Dipeptide Isosteres
摘要:
A simple, convergent, and stereoselective synthesis of hydroxyethylene dipeptide isosteres 1 and 2 from scalemic alpha-hydroxy esters has been developed. The method is short (six steps), efficient (approximate to 15-25% overall), and highly diastereoselective (86-94% de) and enantioselective (> 95% ee).
A Stereocontrolled Synthesis of Monofluoro Ketomethylene Dipeptide Isosteres
作者:Robert V. Hoffman、Junhua Tao
DOI:10.1021/jo981334y
日期:1999.1.1
A simple, stereocontrolled synthesis of monofluoro ketomethylene dipeptideisosteres has been developed. N-Tritylated ketomethylene dipeptideisosteres, prepared from N-tritylated amino acids, are converted to their Z-TMS enol ethers and fluorinated with Selectfluor. There is cooperative stereocontrol between the N-tritylamine group and the alkyl group at C-2. The method is short (six steps), diastereoselective
A stereocontrolled synthesis of monofluoro ketomethylene dipeptide isosteres
作者:Robert V. Hoffman、Junhua Tao
DOI:10.1016/s0040-4039(98)00783-7
日期:1998.6
A simple, stereocontrolled synthesis of monofluoro ketomethylene dipeptideisosteres has been developed. The method is short (6 steps) and diastereoselective (85–95% de) and enantioselective (>95% ee).
A Stereocontrolled, Convergent Synthesis of Hydroxyethylene Dipeptide Isosteres
作者:Junhua Tao、Robert V. Hoffman
DOI:10.1021/jo970579s
日期:1997.9.1
A simple, convergent, and stereoselective synthesis of hydroxyethylene dipeptide isosteres 1 and 2 from scalemic alpha-hydroxy esters has been developed. The method is short (six steps), efficient (approximate to 15-25% overall), and highly diastereoselective (86-94% de) and enantioselective (> 95% ee).
A simple, stereoselective synthesis of ketomethylene dipeptide isosteres
作者:Robert V. Hoffman、Junhua Tao
DOI:10.1016/s0040-4020(97)00410-9
日期:1997.5
An exceedingly simple, general, and stereoselective method for the preparation of ketomethylene dipeptideisosteres (5-(carbobenzyloxyamino)-2-alkyl-γ-ketoesters) from Cbz-protected amino acids and scalemic 2-triflyloxy esters has been developed. The method is short (three steps), efficient, and highly diastereoselective and enantioselective.