Toward a total synthesis of stigmatellin; an unproductive C-1′–C-2′ disconnection
摘要:
Although the lithio derivative of the dimethylchromone 6c could be condensed with reactive organic electrophilic species and iodine to give, respectively, homologated at C-1' (stigmatellin numeration) chromones and the iodide 6a, it proved impossible to convert efficiently either 6a or 6c into stigmatellin la by an anionic alkylation process. (C) 2000 Elsevier Science Ltd. All rights reserved.