提出了在双酸催化剂上在微反应器中由木糖有效连续生产糠醛。在这项工作中,以甲酸和氯化铝为催化剂,在无有机溶剂体系中合成了糠醛。检查和验证了这些催化剂在连续反应中的作用。研究并优化了木糖浓度、反应温度、停留时间、催化剂总浓度、催化剂配比等操作条件对糠醛收率的影响。在反应温度180℃、停留时间15分钟、催化剂摩尔比1:1、木糖浓度1 g L -1条件下,糠醛收率为92.2%。,总催化剂浓度为 16 mM。与基于文献的其他系统相比,我们的工艺在低催化剂浓度和短停留时间方面突出显示了优越的生产性能。此外,展示了连续原位催化剂去除(纯化),为连续糠醛生产的实际发展提供了进一步的见解。
Chemical Etiology of Nucleic Acid Structure: The Pentulofuranosyl Oligonucleotide Systems: The (1′→3′)-β-<scp>L</scp>-Ribulo, (4′→3′)-α-<scp>L</scp>-Xylulo, and (1′→3′)-α-<scp>L</scp>-Xylulo Nucleic Acids
RNA, with pentulose sugars, gives rise to prospective oligonucleotide candidates that are potentially prebiotic structural variants of RNA that could be formed by the same type of chemical pathways that gave rise to RNA from ribose. The potentially natural alternative (1′→3′)‐ribulo oligonucleotides and (4′→3′)‐ and (1′→3′)‐xylulo oligonucleotides consisting of adenine and thymine were synthesized and
The chemicalsynthesis of ketopentose-5-phosphates that are involved in the pentose phosphate pathway is developed. The ketopentose phosphates, D-ribulose-5-phosphate and D-xylulose-5-phosphate, were prepared in five steps starting from known intermediates. Starting from readily available D-aldopentoses, the reduction of the corresponding furanose derivatives gave key intermediates in the form of aldopentitols
An effective continuous furfural production fromxylose in a microreactor over dual-acid catalysts was proposed. In this work, furfural was synthesized in an organic solvent-free system using formic acid and aluminum chloride as catalyst. The role of these catalysts in the consecutive reactions was examined and verified. The influence of operating conditions including xylose concentration, reaction
提出了在双酸催化剂上在微反应器中由木糖有效连续生产糠醛。在这项工作中,以甲酸和氯化铝为催化剂,在无有机溶剂体系中合成了糠醛。检查和验证了这些催化剂在连续反应中的作用。研究并优化了木糖浓度、反应温度、停留时间、催化剂总浓度、催化剂配比等操作条件对糠醛收率的影响。在反应温度180℃、停留时间15分钟、催化剂摩尔比1:1、木糖浓度1 g L -1条件下,糠醛收率为92.2%。,总催化剂浓度为 16 mM。与基于文献的其他系统相比,我们的工艺在低催化剂浓度和短停留时间方面突出显示了优越的生产性能。此外,展示了连续原位催化剂去除(纯化),为连续糠醛生产的实际发展提供了进一步的见解。