CuX<sub>3</sub>Li<sub>2</sub>-catalysed conjugate addition of dialkylmagnesium reagents to α,β-unsaturated carbonyl compounds
作者:Manfred T. Reetz、Alois Kindler
DOI:10.1039/c39940002509
日期:——
Copper salts of the type CuX3Li2(X = halogen) catalyse the conjugate addition of dialkylmagnesiumcompounds to α,β-unsaturated carbonyl compounds in the presence or absence of Me3SiCl as an additive, the organomagnesium compounds being prepared from α-olefins, hydrogen and magnesium according to the procedure of Bogdanović.
在存在或不存在作为添加剂的Me 3 SiCl的情况下,CuX 3 Li 2类型的铜盐(X =卤素)催化二烷基镁化合物共轭加成到α,β-不饱和羰基化合物上,有机镁化合物由α-根据Bogdanović的程序制备烯烃,氢和镁。
Applications of poly(α-olefin)s as solvents in organometallic chemistry
作者:Sopida Thavornpradit、Thomas J. Malinski、David E. Bergbreiter
DOI:10.1016/j.jorganchem.2022.122261
日期:2022.3
Poly(α-olefin)s (PAOs) that can be used as alternative solvents and solvent systems for catalysis and synthesis can substitute for conventional alkane solvents like pentane, hexane, and heptane for storage and in reactions of reactive organometallics. In this work, we show that organolithium reagents including polymer-supported diphenyllithium and triaryllithium reagents have extended stability as suspensions
聚 (α-烯烃) (PAO) 可用作催化和合成的替代溶剂和溶剂系统,可替代戊烷、己烷和庚烷等常规烷烃溶剂,用于储存和反应性有机金属的反应。在这项工作中,我们表明,包括聚合物负载的二苯基锂和三芳基锂试剂在内的有机锂试剂在 PAO 中作为悬浮液或溶液具有扩展的稳定性,就像烷基锂试剂一样。这些高度着色的物质在 PAO 溶剂中可稳定数月。PAO 也可用作二烷基镁试剂的更安全溶剂。在 PAO 溶剂中,这些二烷基镁试剂与苯甲醛、二苯甲酮和二氧化碳等亲电子试剂的反应与在庚烷中的反应相同。当通过蒸馏或萃取从 PAO 中分离产品时,PAO 还可用作烯烃硼氢化/氧化中的可回收溶剂。与烷基锂或二烷基镁试剂的 PAO 溶液相比,三己基硼烷在 PAO 中的溶液中的 PAO 在暴露于丙烷火炬火焰时本身不会燃烧。虽然烷基硼烷确实以绿色火焰短暂燃烧,但由于硼烷的燃烧,该火焰会在硼烷消耗后自行熄灭。PAO 本身不会着火。最后,我们检查了含有聚异丁烯