Novel syntheses of 1-hydroxy-6- and -5-nitroindole-3-carbaldehydes, and their derivatives as daikon-phytoalexin analogs

金沢大学大学院自然科学研究科生理活性物質科学金沢大学薬学部1-Hydroxy-6- and -5-nitroindole-3-carbaldehydes are prepared for the first time from 1-methoxy-6- and -5-nitroindole-3-carbaldehydes, respectively, based on the discovery of novel methyl ether cleavage reaction. Utilizing them as common synthetic intermediates, syntheses of several daikon-phytoalexin analogs are achieved