易于获得的(3-呋喃基)烯丙胺与顺丁烯二酸酐的反应,然后是涉及酰化/环加成/质子转移步骤的多米诺序列,导致呋喃[2,3 - f ]异吲哚的形成,即吡gui烷的氮杂类似物型倍半萜。关键的分子内Diels–Alder乙烯基呋喃(IMDAV)反应在温和的条件下进行,具有高水平的非对映选择性和令人满意的收率。
易于获得的(3-呋喃基)烯丙胺与顺丁烯二酸酐的反应,然后是涉及酰化/环加成/质子转移步骤的多米诺序列,导致呋喃[2,3 - f ]异吲哚的形成,即吡gui烷的氮杂类似物型倍半萜。关键的分子内Diels–Alder乙烯基呋喃(IMDAV)反应在温和的条件下进行,具有高水平的非对映选择性和令人满意的收率。
An optimized process for the stereospecificsynthesis of carbacephem key intermediates 3β-[4-(S)-phenoxyacetylamino-4β-[2-(2-furyl)ethyl]azetidin-2-one (1) and 3β-[4-(S)-phenyl-acetylamino-4β-[2(2-furyl)ethyl)]azetidin-2-one] (2) is described. This report provides an efficient and cost-effective process for achieving a consistent yield and quality of intermediates 1 and 2 via Birch reduction employing