| 摘要 |
PURPOSE:To obtain the titled compound useful as a raw material for the production of pharmaceuticals and agricultural chemicals, in high yield, by reacting a univalent or bivalent metal salt with a methylolated composition of formamide containing N-(hydroxymethyl)formamide, while controlling the pH of the reaction system at a specific level. CONSTITUTION:The objective compound of formula II is produced by mixing (A) a univalent or bivalent metal salt of the compound of formula RSO2H (R is phenyl) with (B) a methylolated composition of formamide containing N-(hydroxymethyl)formamide of formula I, and reacting the components with each other at 60-100 deg.C for 1-10hr while keeping the pH of the system to 3.0-5.0, preferably 3.5-4.5 with an acid such as hydrochloric acid, sulfuric acid, etc. The amount of the acid is 1.2-5.0 equivalent based on the metal salt, and the methylolated composition is a mixture of the compound of formula I, formamide, and N,N-bis(hydroxymethyl)-formamide.
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