【摘 要】
：
<正> 碲试剂作为还原剂已得到较广泛的应用,Yamashita、周洵钧将NaHTe用于羰基化合物还原胺化为二级胺,Kambe等近期用H_2Te还原烯胺、亚胺到相应的胺,我们曾用NaHTe将二级胺
论文部分内容阅读
<正> 碲试剂作为还原剂已得到较广泛的应用,Yamashita、周洵钧将NaHTe用于羰基化合物还原胺化为二级胺,Kambe等近期用H_2Te还原烯胺、亚胺到相应的胺,我们曾用NaHTe将二级胺与羰基化合物还原烷基化。本文采用不同二级胺进一步研究发现,脂肪环胺与醛的反应效果较好,同一条件下烯胺也可被还原,反应条件温和,脯氨酸酯还原烷基化的产物不发生明显消旋化(表1,3),可应用于氨基酸类反应。
其他文献
本文以二过碘酸合铜(Ⅲ)钾为氧化剂,聚丙烯酰胺(PAAM)自身为还原剂组成的氧化还原引发体系,在PAAM上引发丙烯腈接枝共聚合反应,获得了高接枝效率和高接枝百分比的产物,由红外
The influence of organic waste as an additive to concrete formulation has been studied by replacing up to 10% of cement ratio with locally sourced organic addit
High methoxyl pectin (DE = 59.53%) was extracted from plantain peel using acid extraction method. Pectin yield was 40.5%;moisture content was 87.56%;equivalent
文章为探究猪肉的资源化利用潜力,对新鲜购买的猪肉进行厌氧消化实验,分别以猪皮、猪瘦肉和猪脂肪为实验原料,实验温度为30℃,采用批量式发酵工艺,进行发酵产沼气实验。整个
Monolayer MoS2 has excellent optoelectronic properties, which is a potential material for solar cell. Though MoS2/c-Si heterojunction solar cell has been resear
In this work, the effect of heat input on the mechanical properties of low-carbon steel was studied using two welding processes: Oxy-Acetylene Welding (OAW) and
<正>习近平总书记在全国高校思想政治工作会议上的重要讲话中强调指出,办好中国特色社会主义高校,全面贯彻党的教育方针,必须做到'四个坚持不懈',即坚持不懈传播马克
Iron-chromium cast alloys are basically abrasive wear resistant materials particularly employed in mining industry;these alloys are often utilized in the manufa
Welding technology is very vital for the industrial development and technological advancement of any country. In this regard achieving good quality machine manu
江苏制造业起步早、总量大、产业优、企业强，总体走在全国前列，但近几年在新一轮技术与产业变革的大潮中，开始呈现出原有优势有所削弱、未来优势构建不快的突出问题。如何保持江苏制造业在全国领先的竞争优势，可以说既面临诸多已经显现的近忧，也有不容回避的远虑，必须以新发展理念为指导，以更加开阔的视野和深邃的洞察力，深刻剖析制约江苏制造业发展的突出问题，进一步厘清重点领域发展方向，探索破难题、补短板、增优势的有