Addition of the dianion of (+)-(R)-3-[(4-methylphenyl)sulphinyl]propionic acid (1) to aldehydes affords two main diastereoisomeric β-sulphinyl-γ-lactones, pyrolysis of which gives the two enantiomers of 5-substituted furan-2(5H)-ones in optically pure form.
的二价阴离子的加成(+) - ([R)-3 - [(4-甲基苯基)亚磺酰基]
丙酸(1)为醛,得到两个主要非对映异构β-亚-γ内酯,热解,其中给出了两种对映体光学纯净形式的5-取代的
呋喃2(5 H)-ones。