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:US10072036B2
公开(公告)日:2018-09-11
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.
本发明涉及通式 I 至 IV (I) (II) (III) (IV) 的 N-杂环碳烯络合物,其中 A1 代表 NR2 或 PR2,A2 代表 CR2 R2′、NR2、PR2、0 或 S,A3 代表 N 或 P、环 B 是未取代的或单取代或多取代的 5 至 7 元环,取代基 R2 和 R2′ 除其他外代表直链或支链 C1-Cw 烷基,以及如果 N 和 N 分别代表 NR2 或 PR2,它们相同或不同,则式 I、II、III 或 IV 中的 M 代表 Cr、Mo 或 W,式 I 至 IV 中的 X 1 或 X2 相同或不同,并且除其他外代表C1-C1s-羧酸盐和 C1-C1s-烷氧基,Y 代表氧或硫,Z 代表直链或支链 C1-Cw 烷氧基,式 I 至式 IV 中的 R 1 和 R1′ 代表脂肪族或芳香族。这些化合物特别适合用作烯烃复分解反应的催化剂,与已知的施罗克碳烯络合物相比,它们的优点是对官能团的耐受性明显增强,特别是对醛、仲胺、腈、羧酸和醇等官能团的耐受性。