一锅串联环化为吡咯并[1,2- a ] [1,4]苯并二氮杂卓类化合物:Pictet-Spengler反应的改进方法
摘要:
我们已经报道了在改良的Pictet-Spengler反应中在短时间内在改良的Pictet-Spengler反应中合成高浓缩杂环,吡咯并[1,2- a ] [1,4]苯并二氮杂物的一锅两步方法。我们的方法相对于常规的两组分合成方法具有一些优势,因为它是一步法和原子经济,对环境有益的方法,并且是一种收敛的合成方法。我们在这里讨论了这种新颖方法的广泛的基质范围。
An unprecedented functional group assisted CuI‐catalyzed defunctionalization reaction has been developed. The simple strategy can remove the ester with the methylene group (–CH2CO2R) from a large array of N‐pyridinyl pyrrolo esters. In addition to the synthesis, an interesting extensive mechanistic study with evidence on the roles of both CuI and the N‐pyridinyl ring is also reported.
已经开发出前所未有的官能团辅助的Cu I催化的去官能化反应。简单的策略可以从大量N-吡啶基吡咯烷酸酯中除去带有亚甲基的酯(–CH 2 CO 2 R)。除了合成以外,还报道了一项有趣的广泛的机理研究,该研究提供了有关Cu I和N-吡啶基环的作用的证据。
An efficient synthesis of pyrrole and fluorescent isoquinoline derivatives using NaN3/NH4Cl promoted intramolecular aza-annulation
An efficient synthetic protocol of pyrroles and isoquinolines through NaN3/NH4Cl promoted intramolecular aza-annulation of formyl group with suitable alkenes or alkynes is described in high yield and regioselectivities. The metal free exo-trig and endo-dig aza-cyclisation has been extended for the synthesis of bicyclic or tricyclic pyrroles along with environment sensitive fluorescent isoquinoline
A number of benz[e]indene derivatives have been prepared at room temperature in good to excellent yields by treating 3-(2-formyl-cycloalkenyl)-acrylic acid esters with diphosphorus pentasulfide. An azulene derivative was also synthesized by this simple method.
通过用五硫化二磷处理3-(2-甲酰基-环烯基)-丙烯酸酯,在室温下以良好或优异的产率制备了许多苯并[ e ]茚衍生物。还通过该简单方法合成了z并衍生物。
Neat synthesis of <i>c</i>-fused pyrroles and its application to macrolactamization
Abstract The current study describes an efficient environmental benign synthetic route of N-aryl substituted c-fused pyrrole derivatives via neat approach. It also provides base-mediated intramolecular macrolactamization using amine ester amidation reaction and leads to fused diazocine-6(5H)-one with effective yields.