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Solid Phase Synthesis of 2-Substituted 1,3-Oxazin-6-ones Using Resin-bound Cyclic Malonic Acid Ester
A facile solid phase synthesis of 2-substituted 1,3-oxazin-6-ones using polymer-supported Meldrum‘s acid has been reported. Reaction of the resin-bound cyclic malonic acid ester with triethyl orthoformate and subsequent double substitution with amide, afforded the corresponding polymer-supported acylaminomethylene cyclic malonic acid ester, which upon thermal treatment led to 1, 3-oxazin-6-ones in good yields and with high purity. 相似文献
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A facile solid phase synthesis of ethyl β-substituted indolepropionates is reported. Condensation between indole, polymer-supported cyclic malonic acid ester and aldehyde yielded the trimolecular adducts, which was cleaved by pyridine/EtOH to release the final products in good yield with high purity. 相似文献
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钯(Pd)是一种性质非常特殊的稀有过渡金属,在化学以及材料科学中具有重要地位.钯催化反应的产物中常有一定浓度的残余钯污染,需要进一步纯化和检测.因此发展用于检测Pd的技术手段很有必要.零价钯可以通过对烯丙基氧化插入而切断烯丙基醚类化合物的C-O键.基于这个反应,设计合成了荧光分子二氟硼姜黄素烯丙基醚化合物,并测试了其紫外光谱和荧光光谱,研究了其对钯化合物的选择性识别作用.结果表明,该荧光分子对二价钯并无响应,只有零价钯Pd2(dba)3使该分子荧光发生猝灭.该荧光分子对于零价钯表现出很好的选择性和响应性,可作为基于脱烯丙基化反应检测零价Pd的荧光探针,为“turn off”型荧光探针. 相似文献
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