Organolanthanide-catalyzed intramolecular hydroamination/cyclization of amines tethered to 1,2-disubstituted alkenes.

Organolanthanide-catalyzed intramolecular hydroamination/cyclization of amines tethered to 1,2-disubstituted alkenes.
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DOI:
10.1021/ol010129t
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发表时间:
2001-09
期刊:
影响因子:
5.2
通讯作者:
Jae-Sang Ryu;T. Marks;Frank E. McDonald
Jae-Sang Ryu;T. Marks;Frank E. McDonald
中科院分区:
化学1区
文献类型:
--
作者:
Jae-Sang Ryu;T. Marks;Frank E. McDonald

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[反应:本文报道了有机镧系元素催化的分子内胺氢胺化/环化反应,通过使用配位不饱和配合物(eta(5)-Me(5)C(5))(2)LnCH(TMS)(2),将胺与1,2-二取代烯烃连接,得到相应的单取代和二取代吡咯烷和哌啶。(Ln = La,Sm)、[Me(2)Si(eta(5)-Me(4)C(5))(2)]NdCH(TMS)(2)、[Et(2)Si(eta(5)-Me(4)C(5))(eta(5)-C(5)H(4))]NdCH(TMS)(2)和[Me(2)Si(eta(5)-Me(4)C(5))((t)BuN)]LnE(TMS)(2)(Ln = Sm,Y,Yb,Lu; E = N,CH)作为预催化剂。[Me(2)Si(eta(5)-Me(4)C(5))((t)BuN)]LnE(TMS)(2)介导空间要求高的氨基烯烃的分子内氢胺化/环化,以高非对映选择性(反式/顺式= 16/1)和良好至优异的产率提供二取代吡咯烷。
[reaction: see text] This contribution reports the organolanthanide-catalyzed intramolecular hydroamination/cyclization of amines tethered to 1,2-disubstituted alkenes to afford the corresponding mono- and disubstituted pyrrolidines and piperidines by using coordinatively unsaturated complexes of the type (eta(5)-Me(5)C(5))(2)LnCH(TMS)(2) (Ln = La, Sm), [Me(2)Si(eta(5)-Me(4)C(5))(2)]NdCH(TMS)(2), [Et(2)Si(eta(5)-Me(4)C(5))(eta(5)-C(5)H(4))]NdCH(TMS)(2), and [Me(2)Si(eta(5)-Me(4)C(5))((t)()BuN)]LnE(TMS)(2) (Ln = Sm, Y, Yb, Lu; E = N, CH) as precatalysts. [Me(2)Si(eta(5)-Me(4)C(5))((t)BuN)]LnE(TMS)(2) mediates intramolecular hydroamination/cyclization of sterically demanding amino-olefins to afford disubstituted pyrrolidines in high diastereoselectivity (trans/cis = 16/1) and in good to excellent yield.