An enantioconvergentroute for natural form of ethyl shikimate was achieved from Diels–Alder adduct of furan and acryloyl chloride. The key step was a highly enantioselective (E >500) and efficient acetylation of ethyl (3R*,4S*,5S*)-5-hydroxy-3,4-isopropylidenedioxycyclohex-1-enecarboxylate, which had a diastereomeric relationship with ethyl shikimate, mediated by Burkholderia cepacia lipase (Amano
从呋喃和丙烯酰氯的Diels-Alder加合物获得了天然形式的sh草酸乙酯的对映体聚合路线。关键步骤是高对映选择性(E > 500)和乙基(3 R *,4 S *,5 S *)-5-羟基-3,4-异丙基二烯二氧基环己-1-烯羧酸酯的高效乙酰化反应,该反应具有非对映异构关系由sh草伯克霍尔德氏菌脂肪酶(Amano PS-IM)介导的sh草酸乙酯。通过分别在前者的C-5和后者的C-3和C-4下将两种拆分的对映异构体转化为sh草酸乙酯的天然形式。