作者:BRUNNER, HENRI、KURZINGER, ALFRED、MAHBOOBI, SIAVOSH、WIEGREBE, WOLFGANG
DOI:——
日期:——
Synthesis of thePreininger-Alkaloid and its Enantioselective Reduction to Macrostomine
作者:Siavosh Mahboobi、Wolfgang Wiegrebe
DOI:10.1002/ardp.19913240504
日期:——
via a Mannich base to the nitrile 17 (Scheme 7) which in turn is cyclized to the Preininger‐alkaloid (2b) by careful hydrogenation. ‐ Reduction of 2b with a modified Iwakuma‐reagent, followed by N‐formylation and subsequent LiAlH4‐reduction produced (R)‐(+)‐macrostomine (enantiomer of 1) in 72% optical purity.