Alkaloids and polyketides from the South China Sea sponge Agelas aff. nemoechinata
作者:Liang An、Wenjuan Song、Xuli Tang、Nicole J. de Voogd、Qi wang、Meijun Chu、Pinglin Li、Guoqiang Li
DOI:10.1039/c6ra27026c
日期:——
New pyrrole alkaloids, diterpene-adenine alkaloids with cytotoxic activity, and polyketides were isolated from the South China Sea sponge Agelas aff. nemoechinata.
Synthesis of Hydroxypyrrolone Carboxamides Employing Selectfluor
作者:Tim Carlo Allmann、Rares-Petru Moldovan、Peter G. Jones、Thomas Lindel
DOI:10.1002/chem.201503695
日期:2016.1.4
Reaction of pyrrole‐2‐carboxamides with Selectfluor in MeCN/water (4:1) affords 2‐hydroxy‐5‐oxopyrrole‐2‐carboxamides in yields of up to 80 %. A variety of sensitive functional groups is tolerated, among them aldehydes and alkynes. The new method also works in the presence of allyl groups and appears to be superior to the use of singlet oxygen. Reaction of the monobrominated dihydropyrrolo[1,2‐a]pyrazinone