Bis(cyclopentadienyl)tetracarbonyldimolybdenum-alkyne complexes mediated [2 + 2 + 1] cycloaddition: the formation of 3-substituted cyclopentenone derivatives
作者:Chisato Mukai、Masahiko Uchiyama、Miyoji Hanaoka
DOI:10.1039/c39920001014
日期:——
On heating, bis(cyclopentadienyl)tetracarbonyldimolybdenum-alkyne complexes undergo a [2 + 2 + 1] cycloaddition with norbornadiene or norbornene to afford the corresponding-3 substituted cyclopentenone derivatives, which could heardly be obtained in the cobalt-complexed alkyne-mediated Pauson-Khand reaction.
Synthesis and Application of β-Substituted Pauson-Khand Adducts: Trifluoromethyl as a Removable Steering Group
作者:Nuria Aiguabella、Carlos del Pozo、Xavier Verdaguer、Santos Fustero、Antoni Riera
DOI:10.1002/anie.201300907
日期:2013.5.10
Against the rules: The synthesis of the previously unknown β‐substituted regioisomers of the intermolecular Pauson–Khand reaction of terminal alkynes is reported. This regiochemistry was achieved by using the trifluoromethylgroup as a removable directing group on the alkyne.