Synthesis of the C3−C18 Fragment of Amphidinolides G and H
作者:Andreas F. Petri、John S. Schneekloth,、Amit K. Mandal、Craig M. Crews
DOI:10.1021/ol071024e
日期:2007.8.1
A synthesis of an amphidinolides G and H C3-C18 subunits is reported. The C10-C18 segment 4 was prepared by a Negishi cross-coupling, whereas the synthesis of the C3-C9 fragment 5 employed an asymmetric cyanosilylation as the key step. The two segments were coupled by lithiation of iodide 4 and trapping of the anion with amide 5. The allylic epoxide moiety could be synthesized from the protected anti-