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。
Iodine-catalyzed chemoselective dehydrogenation and aromatization of tetrahydro-β-carbolines: A short synthesis of Kumujian-C, Eudistomin-U, Norharmane, Harmane Harmalan and Isoeudistomine-M
作者:Sunil Gaikwad、Dayanand Kamble、Pradeep Lokhande
DOI:10.1016/j.tetlet.2018.04.043
日期:2018.6
Temperature controlled chemoselective dehydrogenation and aromatization of tetrahydro-β-carbolines, using molecular I2 and H2O2, in DMSO solvent affords a practical access to a series of corresponding 3,4-dihydro-β-carbolines and β-carbolines respectively. This method has been successfully employed in the short synthesis of Kumujian-C, Eudistomin-U, Norharmane Harmane Harmalan and Isoeudistomin-M.
在DMSO溶剂中使用分子I 2和H 2 O 2对四氢-β-咔啉进行温度控制的化学选择性脱氢和芳构化,可分别实际获得一系列相应的3,4-二氢-β-咔啉和β-咔啉。该方法已成功用于Kumujian-C,Eudistomin-U,Norharmane Harmane Harmalan和Isoeudistomin-M的短合成中。
Microwave Assisted Pictet–Spengler and Bischler–Napieralski Reactions
作者:Bikash Pal、Parasuraman Jaisankar、Venkatachalam S. Giri
DOI:10.1081/scc-120021516
日期:2003.1.7
Abstract Pictet–Spengler and Bischler–Napieralskireaction products have been prepared–using microwave irradiation on silicagel support under solvent free condition. Microwave assisted reactions have resulted in better yields of the desired products than prepared under conventional conditions.
A convenient synthesis for the conversion of various substituted tetrahydro-β-carbolines has been developed by iron-catalyzed decarboxylative/dehydrogenative aromatization to construct aromatic β-carbolines under air atmosphere. In the presence of a FeCl3 catalyst, this reaction exhibited a good functional group tolerance to produce corresponding β-carbolines in good yields in the absence of any additive
Copper-Catalyzed Protodecarboxylation and Aromatization of Tetrahydro-β-Carboline-3-Carboxylic Acids
作者:Mohd Mordi、Ramu Meesala、Sharif Mansor
DOI:10.1055/s-0033-1340053
日期:——
An efficient synthetic methodology has been developed to construct aromatic β-carbolines from tetrahydro-β-carboline-3-carboxylic acids by copper-promoted sequential decarboxylation and oxidative aromatization.
An Alternative to Pictet-Gams Reaction Triggered by Hendrickson Reagent: Isoquinolines and β-Carbolines from Amides
作者:Shaozhong Wang、Mengde Wu
DOI:10.1055/s-0029-1217138
日期:2010.2
The Hendrickson reagent derived from triflic anhydride and triphenylphosphine oxide exhibited high oxophilicity and induced the intramolecular cyclization of β-arylethylamides perfectly. Thus, a one-pot protocol to access isoquinoline and β-carboline was developed involving cyclization followed by oxidative aromatization. Hendrickson reagent - isoquinoline - β-carboline - β-arylethylamide - manganese(IV)