Stereoselective Synthesis of Both Enantiomers of Trifluoro-γ-valerolactone and Pentafluoro-γ-caprolactone
摘要:
Both enantiomers of 5-(trifluoromethyl)dihydrofuran-2-one (1a) and 5-(pentafluoroethyl)dihydrofuran-2-one (1b) have been synthesised stereoselectively, in four steps, starting from chiral (R)- or (S)-3-[(4-methylphenyl)sulfinyl]propionic acid (2) and commercially available perfluorinated esters. Compound (+)-(S)-1b is the pentafluoro analogue of the aggregation pheromone of Trogoderma glabrum.
Chirale Synthesebausteine durchKolbe-Elektrolyse enantiomerenreiner ?-Hydroxy-carbons�urederivate. (R)- und (S)-Methyl-sowie (R)-Trifluormethyl-?-butyrolactone und -?-valerolactone
作者:Dieter Seebach、Philippe Renaud
DOI:10.1002/hlca.19850680829
日期:1985.12.18
Chiral Building Blocks for Syntheses by Kolbe Electrolysis of Enantiomerically Pure β-Hydroxybutyric-Acid Derivatives. (R)- and (S)-Methyl-, and (R)-Trifluoromethyl-γ-butyrolactones, and -δ-valerolactones
Asymmetric synthesis of γ-perfluoroalkyl(aryl) butyrolactones via organoboranes
作者:P.Veeraraghavan Ramachandran、Kamlesh J. Padiya、Vivek Rauniyar、M.Venkat Ram Reddy、Herbert C. Brown
DOI:10.1016/j.tetlet.2003.11.050
日期:2004.1
Asymmetric ‘allyl’boration of fluorinated aldehydes with α-pinene-based ‘allyl’ boranes provides the corresponding homoallylic alcohols in high ee and de, which upon hydroboration, followed by oxidation with TPAP/NMO furnish γ-perfluoroalkyl(aryl)-γ-butyrolactones.