作者:Alois Fürstner、Melanie Bonnekessel、Jarred T. Blank、Karin Radkowski、Günter Seidel、Fabrice Lacombe、Barbara Gabor、Richard Mynott
DOI:10.1002/chem.200700926
日期:2007.10.26
exquisitely selective ring closing alkyne metathesis reaction (RCAM) catalyzed by the molybdenum tris-amido complex 20 activated in situ with CH2Cl2. The resulting cyclic enyne 76 was subjected to a ruthenium catalyzed trans-hydrosilylation/proto-desilylation tandem. Although [Cp*Ru(MeCN)3]PF6 had previously been recommended as catalyst of choice for trans-hydrosilylation reactions of internal alkynes
Highly Efficient Asymmetric Synthesis of Fluvirucinine A<sub>1</sub> via Zr-Catalyzed Asymmetric Carboalumination of Alkenes (ZACA)−Lipase-Catalyzed Acetylation Tandem Process
作者:Bo Liang、Ei-ichi Negishi
DOI:10.1021/ol702272d
日期:2008.1.1
ZACA-lipase-catalyzed acetylation tandem process has been shown to proceed satisfactorily with either TBS-protected 4-penten-1-ol or 3-buten-1-ol to provide the corresponding enantiomerically pure (R)-2-ethyl-1-alkanols. Either (R)-5 or (R)-6 was converted to 3 in seven steps. The other fragment 4 was synthesized in nine steps from (-)-(S)-citronellol. Conversion of 3 and 4 into 99% pure fluvirucinine