作者:Josep Castells、Francisco López-Calahorra、Fernando Geijo
DOI:10.1016/0008-6215(83)88109-9
日期:1983.6
Abstract The formoin reaction, i.e. , the autocondensation of formaldehyde in an aprotic solvent catalysed by the conjugate base of a thiazolium ion, has been studied in detail. Glucose, galactose, dihydroxyacetone dimer, xylose, and arabinose have been identified as products. The influence of catalysts, temperature, basicity, and reaction time is documented. N , N -Dimethylformamide is a more convenient
摘要详细研究了甲醛化反应,即噻唑鎓离子的共轭碱在非质子传递溶剂中甲醛的自缩合反应。葡萄糖,半乳糖,二羟基丙酮二聚体,木糖和阿拉伯糖已被鉴定为产品。记录了催化剂,温度,碱度和反应时间的影响。N,N-二甲基甲酰胺是比醚,苯或二甘醇二甲醚更方便的溶剂。乙二异丙基胺提供的碳水化合物原料比三乙胺更好。在≤60°时,醛醇缩合降至最低。反应1-2小时后(取决于条件),产量开始下降并在约24小时后变为零。