对稀土金属酰胺引发的吡咯基官能化仲胺的脱氢进行了系统的研究。稀土金属酰胺[(Me 3 Si)2 N] 3 RE(μ-Cl)Li(THF)3与吡咯基官能化的仲胺2- t BuNHCH 2 -5-RC 4 H 2 NH(R = H(1),R = t Bu(2))导致仲胺脱氢,并分离出亚氨基官能化的吡咯基稀土金属络合物[2- t BuN CH-5-RC 4 H 2 N] 2 REN (SiMe3) 2(R = H,RE = Y( 3a),Dy( 3b),Yb( 3c),Eu( 3d); R = t Bu,RE = Y( 4a),Dy( 4b),Er( 4c))。混合配体络合物[2- t BuNCH 2 -5- t Bu-C 4 H 2 N] Er [2- t BuNCH-5- t BuC 4 H 2 N] 2 ClLi 2(THF)( 4c')在短反应时间内分离出用于合成复合物4c的化合物。氘代吡咯基官能化仲胺2-(t
5-CH2NHtBu)2 with AlH3·NMe3 in diethyl ether generates an aluminium dihydride complex, [C4H2N(2,5-CH2NHtBu)2]AlH2 (8), in high yield. Additionally, treating 8 with one equiv. of HOC6H2(-2,6-tBu2-4-Me) in methylene chloride produces [C4H2N(2,5-CH2NHtBu)2][OC6H2(-2,6-tBu2-4-Me)]AlH (9) with the elimination of one equiv. of H2. The aluminiumalkoxide complex 4 shows moderate reactivity toward the ring opening
将含有系列铝衍生物取代的二齿和三齿对称吡咯基配体,[C 4 H ^ 3 NH(2-CH 2 NH吨丁基)]和[C 4 H ^ 2 NH(2,5-CH 2 NH吨丁基)2 ] , 在甲苯 或者 乙醚被合成。它们的反应性及在开环聚合中的应用ε-己内酯已被调查。的反应AlMe 3一当量 [C 4 H 3 NH(2-CH 2 NH t Bu)]的摩尔数甲苯在室温下,通过消除一个当量,以70%的收率得到[C 4 H 3 N(2-CH 2 NH t Bu)] AlMe 2(1)。甲烷。有趣的是,在做出反应时AlMe 3一当量 [C 4 H 3 NH(2-CH 2 NH t Bu)]的摩尔数甲苯在0℃然后在100℃,[C回流4 ħ 3 N(2-CH 2 Ñ吨丁基)}阿尔梅] 2(2)已被分离通过在30%的产率分数recrystalliztion。同样地,AlMe 3有两个当量。C 4 H 3 NH(2-CH
Novel Lanthanide Amides Incorporating Neutral Pyrrole Ligand in a Constrained Geometry Architecture: Synthesis, Characterization, Reaction, and Catalytic Activity
The first series of lanthanide amido complexes incorporating a neutral pyrrole ligand in a constrained geometry architecture were synthesized, and their bonding, reactions, and catalytic activities were studied. Treatment of [(Me3Si)2N]3Ln(μ-Cl)Li(THF)3 with 1 equiv of (N-C6H5NHCH2CH2)(2,5-Me2C4H2N) (1) afforded the first example of bisamido lanthanide complexes having the neutral pyrrole η5-bonded
Lithium Organoaluminate Complexes as Catalysts for the Conversion of CO
<sub>2</sub>
into Cyclic Carbonates
作者:Zhiqiang Guo、Yuan Xu、Jianbin Chao、Xuehong Wei
DOI:10.1002/ejic.202000401
日期:2020.8.9
Four lithiumorganoaluminatecomplexes containing bidentate pyrrolyl ligand were successfully synthesized, and their structural features were provided. These complexes were used as catalysts for chemical fixation of carbon dioxide with epoxides under mild conditions. Among them, complex [C4H3N(AlEt3)(2‐CH2NHLit Bu)][C4H3NLi(2‐CH2NHt Bu)]}2 (4 ), in conjunction with tetrabutyl‐ammonium iodide (TBAI)
Potassium organoaluminate stabilized by bidentate pyrrolyl ligand [C4H3NH(2-CH2NHtBu)] was successfully synthesized and characterized. The solid state structure reveals it is a rare example of an alkyl-bridged K/Al complex, which is interlocked by bridging potassium ions to form a monodimensional polymeric array, and featured an unsupported bridging methyl interaction between potassium and aluminum
成功合成并表征了由双齿吡咯基配体[C 4 H 3 NH(2-CH 2 NH t Bu)]稳定的有机铝酸钾。固态结构表明它是烷基桥K / Al络合物的罕见实例,它通过桥联钾离子互锁以形成一维聚合物阵列,并且其特征在于钾和铝金属之间不支持的桥联甲基相互作用导致最终的二维超分子网络结构。事实证明,在50℃和1atm的二氧化碳压力下,CO 2可以良好的产率高效地转化为环状碳酸酯。
Transition metal-catalyzed C,C- and C,N-cycloaminomethylation reactions of pyrrole and indole
作者:Vnira R. Akhmetova、El’mira M. Bikbulatova、Nail S. Akhmadiev、Nailya F. Galimzyanova、Raikhana V. Kunakova、Askhat G. Ibragimov
DOI:10.1007/s10593-018-2299-6
日期:2018.5
es or a mixture of alkyl(phenyl)amines and paraformaldehyde in the presence of [Ni(Py)4Cl2]·0.76H2O or NiCl2·6H2O catalysts proceeded at positions 2 and 5 of pyrrole ring. Cycloaminomethylation of indole was accomplished effectively at positions 1 and 3 in the presence of ZrOCl2·8H2O catalyst. When carbazole was treated with bis(methoxymethyl)alkylamine in the presence of ZrOCl2·8H2O catalyst, it was