作者:Hiroshi Nishino、Kazu Kurosawa
DOI:10.1246/bcsj.56.474
日期:1983.2
Seven 9-xanthenones were oxidized with manganese(III) acetate to give carboxy-, dicarboxy-, (acetoxymethyl)(carboxy)-, (carboxy)(hydroxymethyl)-, and acetoxymethyl-9-xanthenones, and to yield small amounts of (carboxymethyl)(carboxy)-, carboxymethyl-, (acetoxymethyl)(carboxymethyl)-, bis(acetoxymethyl)-, and diacetoxymethyl-9-xanthenones. The carboxyl group was preferentially introduced into the peri positions and the acetoxymethyl groups were located at positions ortho to the methoxyl or methyl group. The regioselectivity and mechanism of the carboxylation reaction is discussed briefly.
用乙酸锰(III)氧化 7 种 9-氧杂蒽酮,得到羧基、二羧基、(乙酰氧甲基)(羧基)-、(羧基)(羟甲基)- 和乙酰氧甲基-9-氧杂蒽酮、并生成少量(羧甲基)(羧基)-、羧甲基-、(乙酰氧甲基)(羧基甲基)-、双(乙酰氧甲基)-和双乙酰氧甲基-9-氧杂蒽酮。羧基被优先引入周边位置,乙酰氧甲基则位于甲氧基或甲基的正交位置。本文简要讨论了羧化反应的区域选择性和机理。