Synthesis of Hydroxypyrrolone Carboxamides Employing Selectfluor

被引:15
作者
Allmann, Tim Carlo [1 ]
Moldovan, Rares-Petru [1 ]
Jones, Peter G. [2 ]
Lindel, Thomas [1 ]
机构
[1] Tech Univ Carolo Wilhelmina Braunschweig, Inst Organ Chem, Hagenring 30, D-38106 Braunschweig, Germany
[2] Tech Univ Carolo Wilhelmina Braunschweig, Inst Inorgan & Analyt Chem, Braunschweig, Germany
关键词
heterocycles; marine natural products; oxidation; pyrroles; Selectfluor; MARINE SPONGE; SINGLET OXYGEN; NATURAL-PRODUCTS; BIOLOGICAL EVALUATION; A-C; ALKALOIDS; ISOCHRYSOHERMIDIN; PHYCOCYANOBILIN; INHIBITION;
D O I
10.1002/chem.201503695
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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 mukanadin C and its nonbrominated analogue afforded bicyclic hydroxypyrrolones. These compounds are interesting as they constitute a partial structure of the marine natural product oxocyclostylidol.
引用
收藏
页码:111 / 115
页数:5
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