The novel 3H-spiro[1-benzofuran-2-cyclopentan]-3-one skeleton has been madeaccessible by different routes. One- and two-step protocols lead to tricyclic and tetracyclicbenzofuranones 2 and 3, respectively. A four-step synthesis to spirocompound 4 isdescribed. The novel spirocyclic benzofuranones display modest to no inhibition of thehuman peptidyl prolyl cis/trans isomerase Pin1.
                                    新颖的3H-spiro[1-benzofuran-2-cyclopentan]-3-one骨架通过不同途径得以合成。一步和两步的合成路线分别得到
三环和四环的benzofuranones 2和3。文中描述了一种四步合成
螺环化合物4的方法。这些新颖的螺环benzofuranones对人类肽基脯
氨酰cis/trans异构酶Pin1的抑制作用表现出适度或几乎没有抑制效果。