Benzocyclobutadienes: An Unusual Mode of Access Reveals Unusual Modes of Reactivity.
Benzocyclobutadienes: An Unusual Mode of Access Reveals Unusual Modes of Reactivity.
复制标题
DOI:
10.1002/anie.201803872
复制
发表时间:
2018-07-26
期刊:
影响因子:
--
通讯作者:
Hoye TR
中科院分区:
文献类型:
--
作者:
Xiao X;Woods BP;Xiu W;Hoye TR
The reaction of an aryne with an alkyne to generate a benzocyclobutadiene (BCB) intermediate is rare. We report here examples of this reaction, revealed by Diels-Alder trapping of the BCB by either pendant or external, electron-deficient alkynes. Mechanistic delineation of the reaction course is supported by DFT calculations. A three-component process joining a benzyne, first, with an electron-rich and, then, an electron-poor alkyne was uncovered. Reactions in which the BCB functions in a rarely observed role as a 4π diene component in Diels-Alder reactions are reported. The results also shed new light on aspects of the hexadehydro-Diels-Alder reaction used to generate the benzynes. Benzocyclobutadiene (BCB) has been accessed via a [2+2] cycloaddition of a benzyne and an alkyne. The BCB generated by this method exhibited rare reactivity—namely, as a 4π component in a Diels–Alder reaction to furnish highly substituted polyaromatic compounds as the product. DFT calculations revealed many mechanistic details of this cascade process.
登录
查看更多内容
影响因子:
3.6
作者:
PASTO, DJ;KRASNANSKY, R;ZERCHER, C
通讯作者:
ZERCHER, C
影响因子:
15
作者:
Robinson JM;Sakai T;Okano K;Kitawaki T;Danheiser RL
通讯作者:
Danheiser RL
影响因子:
16.6
作者:
Holden Nee Hall, Catherine;Greaney, Michael F.
通讯作者:
Greaney, Michael F.
影响因子:
15
作者:
Halgren, TA;Roberts, JD;Newcomb, M
通讯作者:
Newcomb, M
影响因子:
3.6
作者:
Lee, Chung-Chieh;Leung, Man-kit;Peng, Shie-Ming
通讯作者:
Peng, Shie-Ming