N-Heterocyclic Carbene Complexes Of Metal Imido Alkylidenes And Metal OXO Alkylidenes, And The Use Of Same
申请人:UNIVERSITÄT STUTTGART
公开号:US20170050994A1
公开(公告)日:2017-02-23
The invention relates to an N-heterocyclic carbene complex of general formulas I to IV (I) (II) (III) (IV), according to which A1 stands for NR2 or PR2, A2 stands for CR2 R2′, NR2, PR2, 0 or S, A3 stands for N or P, and C stands for a carbene carbon atom, ring B is an unsubstituted or a mono or poly-substituted 5 to 7-membered ring, substituents R2 and R2′ stand, inter alia, for a linear or branched C1-Cw-alkyl group and, if N and N each stand for NR2 or PR2, are the same or different, M in formulas I, II, III or IV stands for Cr, Mo or W, X 1 or X2 in formulas I to IV are the same or different and represent, inter alia, C1-C1s carboxylates and C1-C1s-alkoxides, Y is inter alia oxygen or sulphur, Z is inter alia a linear or branched C1-Cw-alkylenoxy group, and R 1 and R1′ in formulas I to IV are, inter alia, an aliphatic or aromatic group. These compounds are particularly suitable for use as catalysts for olefin metathesis reactions and have the advantage, compared to known Schrock carbene complexes, of displaying clearly increased tolerance to functional groups such as, in particular, aldehydes, secondary amines, nitriles, carboxylic acids and alcohols.
该发明涉及一种N-杂环卡宾复合物,其一般公式为I至IV(I)(II)(III)(IV),其中A1代表NR2或PR2,A2代表CR2R2′,NR2,PR2,0或S,A3代表N或P,C代表卡宾碳原子,环B为未取代或单取代或多取代的5至7元环,取代基R2和R2′代表线性或支链的C1-Cw-烷基基团,如果N和N分别代表NR2或PR2,则它们可以相同也可以不同,公式I、II、III或IV中的M代表Cr、Mo或W,公式I至IV中的X1或X2是相同或不同的,代表C1-C1s羧酸盐和C1-C1s-烷氧基等,Y为氧或硫等,Z为线性或支链的C1-Cw-烷氧基基团等,公式I至IV中的R1和R1′为脂肪族或芳香族基团等。这些化合物特别适用作为烯烃重排反应的催化剂,并相比已知的Schrock卡宾复合物,具有明显增强的对官能团的耐受性,特别是对醛、二级胺、腈、羧酸和醇等的耐受性增强。