Alkyne oligomerization mediated by rhodium complexes with a phosphinosulfonamido ligand and isolation and characterization of a rhodacyclopentadiene complex期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Alkyne oligomerization mediated by rhodium complexes with a phosphinosulfonamido ligand and isolation and characterization of a rhodacyclopentadiene complex

Authors:	Peng Xue

Affiliation:	Department of Chemistry and Open Laboratory of Chirotechnology of the Institute of Molecular Technology for Drug Discovery and Synthesis, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong

Abstract:	Treatment of N-tosyl aziridine with KPPh₂ in THF produces Ph₂PCH₂CH₂NTsK (Ts = p-CH₃C₆H₄SO₂). Reaction of Ph₂PCH₂CH₂NTsK with [Rh₂(μ₂-Cl)₂(NBD)₂] (NBD = norbornadiene) and [Rh₂(μ₂-Cl)₂(COD)₂] (COD = 1,5-cyclooctadiene) produces [Rh(NBD)(Ph₂PCH₂CH₂NTs)] and [Rh(COD)(Ph₂PCH₂CH₂NTs)] (4), respectively. Reaction of Ph₂PCH₂CH₂NTsK with [Ir₂(μ₂-Cl)₂(COD)₂] gives [Ir(COD)(Ph₂PCH₂CH₂NTs)]. Complex 4 is catalytically active for polymerization of arylalkynes and for cyclotrimerization of HCCCOR (R = OEt, Me). The novel metallacycle [Rh(C(CO₂Et)CHC(CO₂Et)CH)(CH(CO₂Et)CCCCO₂Et)(Ph₂PCH₂CH₂NHTs)₂] was isolated from the reaction of 4 with ethyl propiolate. The metallacycle is catalytically active for cyclotrimerization of ethyl propiolate.

Keywords:	Metallacycles Oligomerization Alkynes N,P ligands Rhodium Iridium
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