中文摘要：

以香草醇等六种化合物为木质素模型物，研究了侧链α-C上官能团和苯环C-3、C-5位甲氧基的取代情况对羟甲基化反应的影响。对产物的红外光谱和核磁共振氢谱分析表明，模型物经过改性后可以引入羟甲基。对模型物在羟甲基化反应过程中结构特性变化的研究表明，羟甲基化反应可在木质素苯环未取代的C-3和C-5上进行。在pH=11时，甲醛消耗量和羟甲基生成量均达到最大值，此时羟甲基化反应程度最大。木质素模型物的α-C基团对苯环的羟甲基化反应也有重要的影响，与α-C为羟基的模型物比较，α-C为醛基的模型物较易发生羟甲基化。由于羟甲基化反应是在碱性条件下进行的，且参加反应的醛均不含α-H，过程中会发生坎尼扎罗反应，产生酸性物质，从而使反应体系的pH值下降。

英文摘要：

Six lignin model compounds were reacted with formaldehyde to investigate the effects of the functional group on α-C and the substitution of methoxyl on C-3 and C-5 on the hydroxymethylization of lignin, FT-IR and IH-NMR analysis show that the hydroxyl methyl can be introduced after modification. The changes of structural characteristics in the process show that the reaction can be carried out on free C-3 and C-5. When the pH of the reaction media is 11, the formaldehyde consumption and hydroxyl methyl prodution both reach the maximum with the largest reaction degree. The functional group on α-C also plays an important role on hydroxylmethylatio. Compared the model compounds with α--hydroxyl, less hydroxylmethyl is introduced on those with a-aldehyde. Cannizzuro reaction also happens between the aldehydes without α--H under the alkaline condition. Then the acidity material is produced which results the decline of pH.