Syntheses of the racemic jaborandi alkaloids pilocarpine, isopilocarpine and pilosinine
作者:Stephen G. Davies、Paul M. Roberts、Peter T. Stephenson、James E. Thomson
DOI:10.1016/j.tetlet.2009.03.021
日期:2009.7
The synthesis of racemic pilocarpine has been achieved in high overall yield. Two alternative approaches for the formation of the γ-butyrolactone ring are described: the first involves a palladium-catalysed carbonylation reaction of a homopropargylic alcohol, whereas the second involves the palladium-catalysed decarboxylation/carbonylation of a 1,3-dioxan-2-one. Subsequent hydrogenation of an α-ethylidene