(C5H5)(CO)2W(η(3)-Me(MeO)CCHCHCOOMe) | 196618-93-6

• 英文名称: (C5H5)(CO)2W(η(3)-Me(MeO)CCHCHCOOMe)
• CAS: 196618-93-6
• 化学式: C₁₄H₁₆O₅W
• 分子量: 448.128
• InChiKey: MPRCMTSHMMZVOI-ZIDOSWBXSA-N

反应信息

• 作为产物：
  描述：

  (C5H5)(CO)2W(η(3)-Me(MeO)CCHCHCOONa) 、 碘甲烷 以 乙腈 为溶剂， 以91%的产率得到(C5H5)(CO)2W(η(3)-Me(MeO)CCHCHCOOMe)
  参考文献：
  名称：

  Acid-Catalyzed Carbonylation of Lactone to Cyclic Anhydride on Tungsten Metal

  摘要：

  Facile carbonylation of the cis-vinyl complex Cp(CO)(3)W[CH=CH(COMe)] (2, Cp = eta(5)-C5H5) followed by cyclization affords the gamma-lactone complex Cp(CO)(2)W[eta(3)-CHCHC(Me)OC(O)] (4). Further carbonylation of 4 induced by the presence of acid in CH3CN gives the cyclic anhydride complex Cp(CO)(CH3CN)W[eta(3)-CHCHC(Me)C(O)OC(O)] (9). The reaction of 4 with Me2NH causes ring opening to yield the zwitterionic complex Cp(CO)(2)W[eta(2)-Me2N=C(Me)CH=CHCOOH] (6). The cyclic anhydride ligand of 9 remains unchanged when 9 is treated with nucleophiles. For example, the reaction of Me2NH with 9 affords the imine-coordinated complex Cp(CO)(Me2NC(Me)=NH)W[eta(3)-CHCHC(Me)C(O)OC(O)] (14), and the reaction of NaBH4 with 9 generates the amine-coordinated complex Cp(CO)(MeCH2NH2)W[eta(3)-CHCHC(Me)C(O)OC(O)] (15). The structures of 4, 6, 9, and 14 have also been determined by X-ray diffraction analysis. The allylic ligand in 9 is in an endo conformation.

  DOI：

  10.1021/om970431z