Alkylation of 3,4-dihydro-β-carboline has been accomplished with organo-copper and -lithium reagents by activation of BF3·OEt2 or trimethylsilyl trifluoromethanesulphonate.
Reusable, homogeneous water soluble photoredox catalyzed oxidative dehydrogenation of N-heterocycles in a biphasic system: application to the synthesis of biologically active natural products
the substrate and catalyst at room temperature. Its potential applications to organic transformations are demonstrated by the synthesis of various biologically active N-heterocycles such as indoles, (iso)quinolines and β-carbolines and natural products such as eudistominU, norharmane, and harmane and precursors to perlolyrine and flazin. Without isolation and purification, the catalyst solution can
DBN has been identified as an efficient reagent for promoting the dehydrogenative/decarboxylative aromatization of tetrahydro-β-carbolines under air atmosphere, to access the corresponding β-carbolines in moderate to good yields. The utility of this protocol for the gram-scale synthesis of β-carboline alkaloids eudistomin U (7) and harmane (10) has also been demonstrated.
Cu-catalyzed mild and efficient oxidation of THβCs using air: application in practical total syntheses of perlolyrine and flazin
作者:Bo Zheng、Tien Ha Trieu、Tian-Zhuo Meng、Xia Lu、Jing Dong、Qiang Zhang、Xiao-Xin Shi
DOI:10.1039/c7ra13434g
日期:——
friendliness, mildness, very good tolerance of functional groups, high yielding and easy experiment operation. In addition, this new methodology was successfully applied in the efficient and practical total syntheses of β-carboline alkaloids perlolyrine and flazin.
开发了一种通过Cu( II ) 催化氧化 1,2,3,4-四氢-β-咔啉 (THβCs)合成芳香族 β-咔啉的温和、高效和环保的方法,其中空气 (O 2 )用作清洁氧化剂。该方法具有环境友好、温和、官能团耐受性好、收率高、实验操作简单等优点。此外,该新方法成功应用于高效实用的β-咔啉生物碱perlolyrine和flalazin的全合成。
Untersuchungen zur
<i>Maillard</i>
‐Reaktion, VII. Bildung von β‐Carbolin‐Derivaten bei der Umsetzung von Tryptamin mit Xylose und Glucose
作者:Theodor Severin、Karl‐Heinz Bräutigam
DOI:10.1002/cber.19731060924
日期:1973.9
Tryptamin und Xylose reagieren in neutraler wäßriger Lösung bei 160°C unter Bildung von 1-(2-Furyl)-β-carbolin (4) und 6,7-Dihydro-12H-indolo[2,3-α]chinolizin-5-ium-l-olat (3). Das gleiche Pyridiniumbetain sowie 1-Acetyl-β-carbolin (15) entstehen bei der Umsetzungvon Tryptamin mit Glucose.
中和剂中的胰蛋白酶和木糖反应物,在德国比尔登冯·1-(2-呋喃基)-β-卡波林(4)和6,7-二氢-12 H-吲哚并[2,3-α] chinolizin-5上于160°C冷冻-ium-l-olat(3)。Das gleiche Pyridinium获得了1-乙酰基-β-卡波林(15)的Utsetzung von Tryptamin mit葡萄糖饮料。