用P 4 S 10和吡啶制得的试剂对Tryptanthrin,Rutaecarpine和相关分子进行电离
摘要:
P 4 S 10在热吡啶中的反应产生了结晶性固体,可以将其收集并用于在其他溶剂(如乙腈和环丁砜)中进行亚硫酰化。具有生物活性的天然产物Tryptanthrine,rutaecarpine,7,8-dehydrorutaecarpine和一些相关化合物现在已经可以通过简单地在环丁砜中用该去硫剂加热分子(通常在135°C加热20分钟),然后将其转化为亚硫酰形式。在水中检查。无需层析。
Condensation of anthranilic acids with pyridines to furnish pyridoquinazolones via pyridine dearomatization
作者:Yajun Yang、Cuiju Zhu、Min Zhang、Shijun Huang、Jingjing Lin、Xiandao Pan、Weiping Su
DOI:10.1039/c6cc07365d
日期:——
The unprecedented carbodiimide-mediated condensation between pyridines and anthranilicacids via pyridines dearomatization at room temperature has been developed to provide a straightforward approach to pyridoquinazolones. The value of this approach...
The total synthesis ofrutaecarpine and several analogues has been developed by using an azido reductivecyclization process starting fromsubstituted azido benzoicacids. The intramolecular azido reductivecyclization step was performed with triphenylphosphine or Ni 2 B in HCl―MeOH (1 M) using microwave irradiation. This synthetic route is amenable for the generation of a library of quinazolinone compounds
已经通过使用从取代的叠氮基苯甲酸开始的叠氮基还原环化过程开发了芸香果芸香碱和几种类似物的全合成。分子内叠氮基还原环化步骤使用三苯基膦或 Ni 2 B 在 HCl-MeOH (1 M) 中使用微波辐射进行。该合成路线适用于生成喹唑啉酮化合物库。
One-pot reductive-cyclization as key step for the synthesis of rutaecarpine alkaloids
The quinazolinocarbolinealkaloids including rutaecarpine (1a), euxylophoricine A (1b), and euxylophoricine C (1c) have been synthesized efficiently from the ring opened β-carboline derivative as key intermediate by a one-pot reductive-cyclization reaction. The key intermediate was prepared from tryptamine (6) following Bischler–Napieralski cyclization, benzoylation, and oxidative cleavage of the exocyclic
A New and Facile Synthesis of Rutaecarpine Alkaloids
作者:Chih-Shone Lee、Cheng-Kuo Liu、Yen-Yao Cheng、Che-Ming Teng
DOI:10.3987/com-08-11606
日期:——
efficiently from the ring opened β-carboline derivatives (3a-d) as key intermediates. A unique one-pot reductive-cyclization as key reaction furnished the synthesis of rutaecarpine alkaloids in excellent yields. The key intermediates (3a-d) were prepared from tryptamine following acylation, Bischler-Napieralski cyclization, benzoylation, and oxidative cleavage of the exocyclic double bond. This new synthetic
Expedious and practical synthesis of the bioactive alkaloids rutaecarpine, euxylophoricine A, deoxyvasicinone and their heterocyclic homologues
作者:Abdulkareem Hamid、Abdelhakim Elomri、Adam Daïch
DOI:10.1016/j.tetlet.2006.01.031
日期:2006.3
deoxyvasicinone (3), is reported from suitable aromatic amino acids 7 or corresponding aromatic amino esters 8 and imino-thioethers 5 or 6 in a one-step sequence in moderate to good yields. The key step of this methodology is based on an intramolecular aza-displacement of a methylthio group followed by spontaneous cyclodehydration. Furthermore, when aromatic amino esters 8 were used instead of amino acids