marinopyrrole F 、 二甲胺 以
四氢呋喃 为溶剂,
反应 48.0h,
以100%的产率得到(4,4',5'-trichloro-5-(dimethylamino)-1'H-1,3'-bipyrrole-2,2'-diyl)bis((2-hydroxyphenyl)methanone)
参考文献:
名称:
Structures, Reactivities, and Antibiotic Properties of the Marinopyrroles A−F
摘要:
Cultivation of actinomycete strain CNQ-418, retrieved from a deep ocean sediment sample off the coast of La Jolla, CA, has provided marinopyrroles A F. Sharing just 98% 16S rRNA gene sequence identity with S. sannurensis, the strain likely represents a new Streptomyces species. The metabolites contain an unusual 1,3'-bipyrrole core decorated with several chlorine and bromine substituents and possess marked antibacterial activity against methicillin-resistant Staphylococcus aureus (MRSA). The congested N,C-biaryl bond establishes an axis of chirality that, for marinopyrroles A-E, is configurationally stable at room temperature. Moreover, the natural products are fashioned strictly in the M-configuration. The Paal-Knorr condensation was adapted for the synthesis of the 1,3'-bipyrrole core. Halogenation of this material with N-bromosuccinimide cleanly furnished the 4,4',5,5'-tetrahalogenated core that characterizes this class of marine-derived metabolites.