Acylation of multiple anions of poly-. beta.-ketones by hydroxy-and alkoxybenzoates. Cyclization of the resultant tetraketones to benzophenones and xanthones

RM Sandifer, AK Bhattacharya…

Index: Sandifer, Ronda M.; Bhattacharya, Ajit K.; Harris, Thomas M. Journal of Organic Chemistry, 1981 , vol. 46, # 11 p. 2260 - 2267

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Citation Number: 46

Abstract

The dianion (2) of 2, 4-pentanedione and the trianion (10) of 2, 4, 6-heptanetrione were acylated by lithium salts of the unprotected hydroxybenzoates methyl 2-hydroxy-4-methoxy- 6-methylbenzoate(lb), methyl 2, 6-dihydroxy-4-methoxybenzoate (7b), and methyl 2, 4- dimethoxy-6-hydroxybenzoate (7c), as well as by the alkoxybenzoates methyl 2, 4, 6- trimethoxybenzoate (7d) and methyl 2, 4, 64ribenzoxybenzoate (7e). The aryl 1, 3, 5, 7- ...