Rapid Access to Benzofuran-Based Natural Products through a Concise Synthetic Strategy
作者:Maddali L. N. Rao、Venneti N. Murty
DOI:10.1002/ejoc.201600154
日期:2016.4
A concise strategy is described for the synthesis of ailanthoidol (1), egonol (2), homoegonol (3), demethoxyegonol (4), demethoxyhomoegonol (5), and stemofuran A (6). This approach involves a Pd-catalysed domino cyclization/coupling process using triarylbismuth reagents for the generation of the benzofuran core. Subsequent structural modifications then give the final targets. The high yielding synthesis
描述了用于合成臭椿素 (1)、egonol (2)、homoegonol (3)、demethoxyegonol (4)、demethoxyhomoegonol (5) 和 Stemofuran A (6) 的简明策略。该方法涉及使用三芳基铋试剂生成苯并呋喃核的 Pd 催化的多米诺环化/偶联过程。随后的结构修改然后给出最终目标。最近分离的天然产物 egonol-9(Z)-12(Z)-linoleate (2a)、7-demethoxyegonol-9(Z)-12(Z)-linoleate (4a) 和 7-demethoxyegonol-9(Z)-12(Z)-linoleate (4a) 的高产合成-egonol-9(Z)-油酸酯 (4b) 也有报道。