Chiral Building Blocks: Enantioselective Syntheses of Benzyloxymethyl Phenyl Propionic Acids
作者:Jack Parsons、Danuta Stachurska-Buczek、Neil Choi、Peter Griffiths、Daniel Huggins、Beata Krywult、Sharon Marino、Thao Nguyen、Craig Sheehan、Ian James、Andrew Bray、Jonathan White、Rustum Boyce
DOI:10.3390/90600449
日期:——
The synthesis of (2S)-2-benzyloxymethyl-3-(2-fluoro-4-methoxyphenyl)- propionic acid, (2S)-2-benzyloxymethyl-3-(2-fluoro-4-methylphenyl)propionic acid and (2S)-2-benzyl-oxymethyl-3-(2,4-dimethylphenyl)propionic acid has been achieved by TiCl4 mediated alkylation of the corresponding (4R)-4-benzyl-3-[3-(2-fluoro-4-methoxyphenyl-, 2-fluoro-4-methylphenyl-, 2,4- dimethylphenyl-)propionyl]-2-oxazolidinones
(2S)-2-苄氧基甲基-3-(2-氟-4-甲氧基苯基)-丙酸、(2S)-2-苄氧基甲基-3-(2-氟-4-甲基苯基)丙酸和(2S)的合成)-2-苄基-氧甲基-3-(2,4-二甲基苯基)丙酸通过TiCl4介导的相应(4R)-4-苄基-3-[3-(2-氟-4-甲氧基苯基)烷基化-, 2-氟-4-甲基苯基-, 2,4-二甲基苯基-)丙酰基]-2-恶唑烷酮,然后水解手性助剂。烷基化反应的立体化学由 (4R)-4-benzyl-3-[(2S)-2-benzyloxymethyl-3-(2-fluoro-4-methylphenyl)propionyl]-2 的 X 射线晶体结构证实-恶唑烷酮。