New insights into the torquoselectivity of the Staudinger reaction.
New insights into the torquoselectivity of the Staudinger reaction.
复制标题
对施陶丁格反应扭矩选择性的新见解。
DOI:
10.1021/ja808046e
复制
发表时间:
2009-02
影响因子:
15
通讯作者:
中科院分区:
文献类型:
--
作者:
To understand the torquoselectivity and the electronic effects of the Staudinger reaction, a study using a combination of experiments and DFT calculations has been conducted for the reactions of an unsymmetric cyclic ketene and cyclic imines with different electronic properties. The predominant formation of the donor-in beta-lactams, the torquoelectronically disfavored products, was observed for the first time. The Hammett analyses reveal a close relationship between the donor-out/donor-in product ratio and the electronic nature of the imines. The kinetic competition experiments and DFT calculations indicate that the two-step Staudinger reaction shows different rate-determining steps in the donor-in and donor-out pathways. Our investigations reveal that the torquoelectronic control in the Staudinger reaction is quite different from that in the ring-opening reaction of cyclobutene derivatives. The diastereoselectivity of the Staudinger reaction involving an unsymmetric disubstituted ketene cannot be simply rationalized or predicted by the torquoelectronic model.
登录
查看更多内容
DOI:
10.1021/jo049081y
发表时间:
2004-09
期刊:
The Journal of organic chemistry
影响因子:
--
作者:
Mikihito Yasui;Y. Naruse;S. Inagaki
通讯作者:
Mikihito Yasui;Y. Naruse;S. Inagaki
影响因子:
1.8
作者:
Y. Naruse;Tomoharu Suzuki;S. Inagaki
通讯作者:
Y. Naruse;Tomoharu Suzuki;S. Inagaki
影响因子:
--
作者:
D. Seebach;A. Beck;A. Heckel
通讯作者:
D. Seebach;A. Beck;A. Heckel
影响因子:
5.2
作者:
Harmata, M;Lee, DR;Barnes, CL
通讯作者:
Barnes, CL
影响因子:
15
作者:
J. Sordo;Javier R González;T. Sordo
通讯作者:
J. Sordo;Javier R González;T. Sordo