硫黄存在下でのヘキサメチルリン酸トリアミドとフタル酸類の反応

抄録

Phthalic acid yielded N-methylphtalimide (1) and N-methylthiophthalimide (2) when heated at 190220°C with hexamethylpho sphoric triamide (HMPA) in the presence of sulfur. Phthalic anhydride gave N, N, N' N'-tetramethylthiophthalamide (4) and N, N, N, N', N'-tetramethyldithiophthalamide (5) under the same conditions. Phthalic thioanhydride also yielded (4) and (5) when heated at 200220°C with HMPA without sulfur, and at 150°C only dimers of phthalic thioanhydride were formed.