Cu-Catalyzed [3 + 3] Annulation for the Synthesis of Pyrimidines via β-C(sp<sup>3</sup>)–H Functionalization of Saturated Ketones
作者:Jun-Long Zhan、Meng-Wei Wu、Fei Chen、Bing Han
DOI:10.1021/acs.joc.6b02181
日期:2016.12.2
A novel, efficient, and facile approach for the synthesis of structurally important pyrimidines has been successfully developed by Cu-catalyzed and 4-HO-TEMPO-mediated [3 + 3] annulation of commercially available amidines with saturated ketones. This method provides a new protocol for the synthesis of pyrimidines by a cascade reaction of oxidative dehydrogenation/annulation/oxidative aromatization
I<sub>2</sub>-Catalyzed Aerobic α,β-Dehydrogenation and Deamination of Tertiary Alkylamines: Highly Selective Synthesis of Polysubstituted Pyrimidines via Hidden Acyclic Enamines
β-dehydrogenation and deamination of tertiary alkylamines. This I2-catalyzed dehydrogenative multicomponent procedure utilizes simplealdehydes to trap the hidden enamine intermediates and suspend generation of azadienes from amidines, enabling the difunctionalization of a vicinal C(sp3)–H bond. These studies provide valuable possibilities for the introduction of aliphatic substituents and show how to
Macrocyclic peptides are disclosed having the general formula:
wherein R
3
, R
3
′, R
4
, R
6
, R′, X, Q and W are described. Compositions comprising the compounds and methods for using the compounds to inhibit HCV are also disclosed.
Macrocyclic peptides are disclosed having the general formula:
wherein R′, R
3
, R
3′
, R
4
, R
6
, X, Q, and W are described. Compositions comprising the compounds and methods for using the compounds to inhibit HCV are also disclosed.