Synthesis of enantiopure diamine ligands related to sparteine, via scandium triflate-catalyzed imino Diels–Alder reactions
作者:Bruno Danieli、Giordano Lesma、Daniele Passarella、Paola Piacenti、Alessandro Sacchetti、Alessandra Silvani、Andrea Virdis
DOI:10.1016/s0040-4039(02)01671-4
日期:2002.9
Imino Diels–Alder reactions have been investigated as a new route to sparteine analogues. The first enantioselective synthesis of two diastereoisomeric tricyclic diamines, structurally equivalent to the ABC and BCD rings of the naturally occurring alkaloid, is reported, starting from enantiopure intermediates. The effectiveness of the diamines in the lithiation of N-Boc-pyrrolidine is discussed.
已研究了Imino Diels–Alder反应,作为制备Sparteine类似物的新途径。从对映体纯中间体开始,报道了两个非对映异构体三环二胺的对映体选择性合成,其结构等同于天然生物碱的ABC和BCD环。讨论了二胺在N -Boc-吡咯烷的锂化中的有效性。