Amidate complexes of titanium and zirconium: a new class of tunable precatalysts for the hydroamination of alkynesElectronic supplementary information (ESI) available: experimental details. See http://www.rsc.org/suppdata/cc/b3/b304176j/
作者:Chunyu Li、Robert K. Thomson、Bronwyn Gillon、Brian O. Patrick、Laurel L. Schafer
DOI:10.1039/b304176j
日期:——
A series of bis(amidate)group 4-bis(amido) complexes have been prepared, characterized and have been shown to be highly tunable precatalysts for both the intra- and intermolecular hydroamination of alkynes.
作者:Paul Benndorf、Jelena Jenter、Larissa Zielke、Peter W. Roesky
DOI:10.1039/c0cc04962j
日期:——
Enantiomerically pure lutetium complexes were synthesized as the first rare earth metal complexes containing a chiral amidinate ligand. The catalytic activity and the enantioselectivity in hydroamination reactions were studied.
The activity of a simple, commercially available copper salt, [Cu(NCMe)4](BF4) in intramolecular hydroamination reactions of alkynes and allenes is presented. Reactions were successfully carried out in technical acetonitrile in the presence of air. While attempts of alkene hydroamination failed, this catalysts was also found active in intermolecular aza-Michael reactions.
Primaryaliphaticamines are important building blocks in organic synthesis due to the presence of a synthetically versatile NH2 group. N-functionalization of primaryamines is well established, but selective C-functionalization of unprotected primaryamines remains challenging. Here, we report the use of CO2 as an activator for the direct transformation of abundant primaryaliphaticamines into valuable
Reaction of aminocarbene complexes of chromium with alkynes. 2. Intramolecular insertions leading to polycyclic lactams
作者:Evelyne Chelain、Andree Parlier、Max Audouin、Henri Rudler、Jean Claude Daran、Jacqueline Vaissermann
DOI:10.1021/ja00076a015
日期:1993.11
Thermolysis of chromium-containing carbene complexes of the general structure (CO) 5 Cr=C(NR 2 R 3 )-(CH 2 ) n C=C-R 1 has been examined. When nitrogen is part of a strained cycle (R 2 R 3 =(CH 2 ) m , m=2, 3) or in an allylic position, or if m>4, then the insertions of the triple bond and of CO, followed by a rearrangement to tricyclic lactams, are observed. This was the case for 14 (R 2 R 3 =(CH
已经检查了一般结构 (CO) 5 Cr=C(NR 2 R 3 )-(CH 2 ) n C=CR 1 的含铬卡宾配合物的热解。当氮是应变循环的一部分 (R 2 R 3 =(CH 2 ) m , m=2, 3) 或处于烯丙基位置时,或者如果 m>4,则三键和 CO 的插入,随后通过重排为三环内酰胺,观察到。14 (R 2 R 3 =(CH 2 ) 3 ,n=4,R 1 =Ph),18 (R 2 R 3 =(CH 2 ) 3 ,n=3,R 1 =Ph) 就是这种情况),对于 27 (R 2 R 3 =CH 2 CH=CHCH 2 ,n=4,R 1 =Ph),分别导致 15、19 和 28,其结构可以通过 X 射线确定晶体学