Synthesis of some carbazolequinone alkaloids and their analogues. Facile palladium-assisted intramolecular ring closure of arylamino-1,4-benzoquinones to carbazole-1,4-quinones.
The radical reactions of imine radicals produced from the metal salts oxidation of 2-amino-1,4-benzoquinones
作者:Po-Yuan Lu、Kuang-Po Chen、Che-Ping Chuang
DOI:10.1016/j.tet.2009.07.025
日期:2009.9
The metal salts mediated oxidative free radical reaction of 2-amino-1,4-benzoquinones is described. Imine radicals can be generated by the oxidation of 2-amino-1,4-benzoquinones with Mn(III) and Ag(II). The dimeric products 4 and 14 were formed via the intermolecular radical coupling reaction of the corresponding radical intermediates 5 and 15. In the presence of styrene, twistane 17 was afforded from