The palladium(0) Suzuki cross-coupling reaction as the key step in the synthesis of aporphinoids
作者:R Suau、R Rico、F Nájera、F.J Ortiz-López、J.M López-Romero、M Moreno-Mañas、A Roglans
DOI:10.1016/j.tet.2004.05.014
日期:2004.6
of phenylboronic acids with sterically hindered 2-bromo phenyl acetates or bromo phenyl acetamides, followed by sequential bicyclization of biarylacetamides promoted by oxalyl chloride/Lewis acid. The reduction of 4,5-dioxoaporphines provides a chemoselective entry to aporphines, dehydroaporphines and 4-hydroxy-dehydroaporphines. A three-steps total synthesis for (±)-O,O′-dimethylapomorphine from readily
我们报告了一种灵活的方法,可以基于钯(0)催化的苯硼酸与空间受阻的2-溴苯基乙酸酯或溴代苯基乙酰胺的铃木交叉偶联,对4,5-二氧杂卟啉进行全合成,然后依次进行二环化的联芳基乙酰胺由草酰氯/路易斯酸。4,5-二氧杂卟啉的还原提供了对磷腈,脱氢紫杉醇和4-羟基-脱氢紫杉醇的化学选择性进入。(±)为一个三步骤的总合成- ø,ö还报道从容易获得的前体'-dimethylapomorphine。