【摘要】 <正> 双苄基异喹啉(BBI)生物碱在植物界分布较广,有的有较强生理活性,是一类重要异喹啉化合物。现已从13科51属植物中分得这类生物碱400余种,包括首尾氧桥型45种和尾尾氧桥型360种左右,其中N-氧化物约30种,但首尾氧桥BBI生物碱-N-氧化物迄今仅发现一种。更多还原

【Abstract】 Oxidation of insularine (Ⅰ) with m-chloroperbenzoic acid yielded four insularine-N-oxides. Two of them are identical in every respect with our insularine-2β-N-oxide (Ⅱ) and insularine-2’β-N-oxide (Ⅲ), two rare examples of naturally occurring head-to-tail bisbenzyliso-quinoline N-oxides newly isolated from Cyclea sutchnenensis, which confirmed the structures of the two novel natural N-oxides. The other two are new. compounds and their structures have been established as insularine-2’α-N-oxide (Ⅳ) and insularine-2β-2’β-N, N-dioxide (Ⅴ), on the basis of spectral data (UV, IR. ~1HNMR, NOEDS AND MS) analysis.更多还原