SEQUENTIAL [2,3]WITTIG AND CLAISEN REARRANGEMENT: A FACILE SYNTHETIC METHOD FOR (<i>E</i>,<i>E</i>)-4,7-ALKADIENALS AND -ALKADIENOIC ACIDS. A NEW FORMAL SYNTHESIS OF (±)-CERULENIN
作者:Koichi Mikami、Naoyuki Kishi、Takeshi Nakai
DOI:10.1246/cl.1981.1721
日期:1981.12.5
The regioselective [2,3]Wittig rearrangement of bis-allylic ethers followed by the Claisen rearragement permits ready access to (E,E)-4,7-alkadienals and -alkadienoic acids. The versatility of the sigmatropic sequence is demonstrated within the context of a new formal synthesis of (±)-cerulenin possessing an interesting spectrum of biological activities.
双烯丙基醚的亲区选择性[2,3]Wittig重排,以及随后的Claisen重排,可以方便地得到(E,E)-4,7-烯丙二烯醛和烯丙二烯酸。在具有多种生物活性的(±)-青霉烯素的新形式合成中,展示了西格马拓扑序列的多功能性。