Diastereodivergent Synthesis of the Quinolizidine‐Indolizidine Alkaloids of the Leontidine/Camoensine Family
作者:Stefan Wagner、Susanne Sigl、Melanie Schenkl、Matthias Breuning
DOI:10.1002/ejoc.202100270
日期:2021.5.7
The tetracyclic alkaloids of the leontidine/camoensine family, which all possess the rare natural quinolizidine‐indolizidine skeleton, were prepared from the commercially available and abundant alkaloid cytisine. The key intermediate was N‐Boc‐11‐oxocytisine, which can be converted in just a few steps into the natural products with an endo‐ or, optionally, exo‐α,N‐fused pyrrolidine.
莱昂替丁/卡莫斯汀家族的四环生物碱均具有稀有的天然喹喔啉-吲哚唑烷骨架,是从可商购的丰富生物碱胞嘧啶中制备的。关键中间体是N-将Boc-11-oxocytisine,其可以在短短步入天然产物具有被转换内切或任选地,外切- α,ñ -融合吡咯烷。