Preparation of (+)-nemorensic acid and approaches to nemorensine using the partial reduction of electron deficient furans
作者:Timothy J. Donohoe、Jean-Baptiste Guillermin、Daryl S. Walter
DOI:10.1039/b202514k
日期:2002.5.23
commercially available furoic acid, the synthesis of (+)-nemorensic acid is described in nine steps, and in 32% overall yield. Key steps in our sequence are a chiral auxiliary controlled, stereoselective, Birch reduction of 3-methyl-2-furoic acid and the stereoselective reaction of an oxonium ion generated within a tetrahydrofuran ring. Attempts to complete the synthesis of nemorensine did not succeed because
从市售开始 糠酸,(+)-nemorensic acid的合成描述为9个步骤,总产率为32%。我们序列中的关键步骤是手性辅助控制,立体选择性,减少桦木 的 3-甲基-2-糠酸和在四氢呋喃环中产生的氧鎓离子的立体选择反应。由于神经核素的低亲核性,未能完成新的神经氨酸的合成尝试。铂炔, 这 生物碱 天然产物的基础部分。