Two types of rhodium-catalyzed CS/CS metathesis reactions: formation of CS/CS bonds and CC/SS bonds
摘要:
A rhodium complex catalyzes two types of single bond metathesis reactions of two CS bonds depending on the added ligand: CS/CS to CS/CS metathesis and CS/CS to CC/SS metathesis. In the presence of a catalytic amount of RhH(PPh3)(4) and 1,1 '-bis(diphenylphosphino)ferrocene (dppf), two 1-alkylthioalkynes exchange alkylthio groups to give equilibrium mixtures of four 1-alkylthioalkynes. When tris(p-methoxyphenyl)phosphine or diphenylmethylphosphine is used, 1,3-butadiynes are obtained. (c) 2008 Elsevier Ltd. All rights reserved.
Two types of rhodium-catalyzed CS/CS metathesis reactions: formation of CS/CS bonds and CC/SS bonds
作者:Mieko Arisawa、Yoko Tagami、Masahiko Yamaguchi
DOI:10.1016/j.tetlet.2008.01.040
日期:2008.3
A rhodium complex catalyzes two types of single bond metathesis reactions of two CS bonds depending on the added ligand: CS/CS to CS/CS metathesis and CS/CS to CC/SS metathesis. In the presence of a catalytic amount of RhH(PPh3)(4) and 1,1 '-bis(diphenylphosphino)ferrocene (dppf), two 1-alkylthioalkynes exchange alkylthio groups to give equilibrium mixtures of four 1-alkylthioalkynes. When tris(p-methoxyphenyl)phosphine or diphenylmethylphosphine is used, 1,3-butadiynes are obtained. (c) 2008 Elsevier Ltd. All rights reserved.
Gold Catalysis: 2,3‐ or 1,4‐Addition to Butadiynes
作者:Philipp M. Stein、Jonas Pascher、Jonas Stracke、Victor S. Levacher、Josefine A. Wagner、Frank Rominger、Thomas Oeser、Matthias Rudolph、A. Stephen K. Hashmi
DOI:10.1002/adsc.202200497
日期:2022.11.22
In the past, numerous impressive methodologies have been developed in homogeneous gold catalysis, typically using alkynes, allenes, or different non-conjugated diyne systems as starting materials. While there are applications catalyzed by other transition metals, the use of 1,3-butadiyne derivatives has been largely neglected in gold catalysis. In this work we present an efficient gold-catalyzed method