Regiospecific synthesis of isopestacin, a naturally occurring isobenzofuranone antioxidant
作者:Pallab Pahari、Bidyut Senapati、Dipakranjan Mal
DOI:10.1016/j.tetlet.2004.04.175
日期:2004.6
A DBU promoted aldol cyclocondensation of hydroxyisobenzofuranone 15 with cyclohexane-1,3-dione, followed by aromatization has resulted in the first short synthesis of isopestacin (1).
Regiospecific synthesis of 3-(2,6-dihydroxyphenyl)phthalides: application to the synthesis of isopestacin and cryphonectric acid
作者:Dipakranjan Mal、Pallab Pahari、Saroj Ranjan De
DOI:10.1016/j.tet.2007.08.048
日期:2007.11
DBU catalyzedcondensation of phthalaldehydic acids and 1,3-diketones has been developed to be a general method for the synthesis of 3-substituted phthalides. This method, in combination with mercuricacetate mediated oxidative aromatization has been utilized for the regiospecific synthesis of isopestacin (9) and cryphonectric acid (10).