Regioselective Metalation of 9-Methoxymethyl-β-carboline-3-carboxamides with Amidomagnesium Chlorides
作者:Wolfgang Schlecker、Andreas Huth、Eckhard Ottow、Johann Mulzer
DOI:10.1055/s-1995-4081
日期:1995.10
The N-protected β-carbolines 3 and 4 undergo exclusive metalation at C-4 with 2,2,6,6-tetramethylpiperidinomagnesium chloride (TMPMgCl) and/or diethylamidomagnesium chloride, whereas the unprotected β-carboline 8 is inert under these conditions. The C-4 metalated species react with electrophiles to give 3,4-disubstituted β-carbolines, which are interesting precursors to physiologically active compounds.
N 保护的δ-咔啉 3 和 4 在 C-4 处与 2,2,6,6-四甲基哌啶氯化镁(TMPMgCl)和/或二乙基脒氯化镁发生排他性金属化反应,而未受保护的δ-咔啉 8 在这些条件下呈惰性。C-4 金属化物种与亲电物反应生成 3,4-二取代的 ²-咔啉,它们是具有生理活性的化合物的有趣前体。