申请人:UNIVERSITY COURT OF THE UNIVERSITY OF ST ANDREWS
公开号:US20140228563A1
公开(公告)日:2014-08-14
Cis and trans ruthenium complexes that can be used as catalysts for ring opening metathesis polymerisation (ROMP) are described. The complexes are generally square pyramidal in nature, having two anionic ligands X. Corresponding cationic complexes where one or both of the anionic ligands X are replaced by a non-co-ordinating anionic ligand are also described. Polymers such as polydicyclopentadiene (PDCPD) can be prepared using the catalysts.
Synthesis of conjugated γ- and δ-lactones from aldehydes and ketones via a vinylation(allylation)-ring closing metathesis–oxidation sequence
作者:J.Alberto Marco、Miguel Carda、Santiago Rodrı́guez、Encarnación Castillo、Marı́a N. Kneeteman
DOI:10.1016/s0040-4020(03)00584-2
日期:2003.6
aldehydes and ketones followed by O-allylation of the obtained carbinols gave the corresponding allyl or homoallyl ethers, respectively. Ring-closing metathesis of these compounds afforded in many cases cyclic ethers (dihydrofurans and dihydropyrans, respectively) bearing disubstituted and trisubstituted CC bonds. These were then subjected to allylic oxidation to yield conjugated γ- and δ-lactones. Reasons
Synthesis of Conjugated γ- and δ-Lactones from Aldehydes and Ketones via a Vinylation/Allylation-Ring Closing Metathesis-Oxidation Sequence
作者:Miguel Carda、Encarnación Castillo、Santiago Rodríguez、Santiago Uriel、J. Alberto Marco
DOI:10.1055/s-1999-2897
日期:——
Nucleophilic C-vinylation or C-allylation of aldehydes and ketones followed by O-allylation of the obtained carbinols gave the corresponding allyl ethers. Ring-closing metathesis of the latter afforded cyclic ethers (dihydrofurans and dihydropyrans, respectively) which were then subjected to allylic oxidation to yield conjugated γ- and δ-lactones.
Synthesis of five-membered unsaturated compounds from ketones via cyanophosphates under neutral conditions: [1,5]-C H insertion of alkylidene carbenes generated by tetrazole fragmentation
Cyanophosphates (CPs) can easily be prepared via the reactions of carbonyl compounds with diethyl phosphorocyanidate (DEPC) in the presence of LiCN (cat.) under non-aqueous conditions. Treatment of ketone-derived CPs with TMSN3/Bu2SnO (cat.) in toluene at reflux produces cyclopentenes or heterocyclic products in good yields under neutral conditions. In this two-step transformation, CPs may form tetrazolylphosphates
在非水条件下,在LiCN(cat。)存在下,羰基化合物与磷腈二乙酯(DEPC)的反应可轻松制得氰基磷酸盐(CPs)。在中性条件下,用甲苯中的TMSN 3 / Bu 2 SnO(cat。)在甲苯中处理酮衍生的CP,可以高产率生产环戊烯或杂环产物。在此两步转化过程中,CP可能形成四唑基磷酸酯,随后对其进行连续裂解以生成亚烷基卡宾,这些卡宾经过[1,5] -CH插入可生成五元化合物。
[EN] RUTHENIUM COMPLEXES FOR USE IN OLEFIN METATHESIS<br/>[FR] COMPLEXES DE RUTHÉNIUM DESTINÉS À ÊTRE UTILISÉS DANS LA MÉTATHÈSE D'OLÉFINES
申请人:UNIV ST ANDREWS
公开号:WO2011117571A1
公开(公告)日:2011-09-29
Cis ruthenium complexes that can be used as catalysts are described. The complexes are generally square pyramidal in nature, having two anionic ligands X adjacent to each other. The complexes can be used as catalysts, for example in olefin metathesis reactions. Corresponding trans ruthenium complexes are also described, together with cationic complexes where one or both of the anionic ligands X are replaced by a non- co-ordinating anionic ligand.