PhI(OAc)<sub>2</sub>-mediated one-pot oxidative decarboxylation and aromatization of tetrahydro-β-carbolines: synthesis of norharmane, harmane, eudistomin U and eudistomin I
A new strategy for synthesis of β-carbolines via one-pot oxidative decarboxylation at room temperature is developed for the first time.
首次开发了一种在室温下通过一锅法氧化脱羧合成β-咔啉的新策略。
An efficient one-pot decarboxylative aromatization of tetrahydro-β-carbolines by using N-chlorosuccinimide: total synthesis of norharmane, harmane and eudistomins
作者:Ahmed Kamal、Manda Sathish、A. V. G. Prasanthi、Jadala Chetna、Yellaiah Tangella、Vunnam Srinivasulu、Nagula Shankaraiah、Abdullah Alarifi
DOI:10.1039/c5ra16221a
日期:——
A mild one-pot synthesis of β-carbolines from their tetrahydro-β-carboline acids has been developed via decorboxylative aromatization using N-chlorosuccinimide (NCS).
Synthesis of β-carbolines via a silver-mediated oxidation of tetrahydro-β-carbolines
作者:Sierra D. Durham、Brianna Sierra、Maximillian J. Gomez、Jennifer K. Tran、Marc O. Anderson、Nick A. Whittington-Davis、Scott Eagon
DOI:10.1016/j.tetlet.2017.05.098
日期:2017.7
The oxidation of tetrahydro-β-carbolines to β-carbolines using silver carbonate was developed as an alternative to current methods. The oxidation is extremely mild and provides the products in modest to good yields after purification. A number of functional groups are tolerated by this methodology, including reduction-sensitive groups which are often cleaved with other methods. Though the mechanism
protocol for carbene insertion into the inert C(sp2)–H bond has been established wherein β-carbolines and isoquinolines are explored as intrinsic directing groups. The Ru(II)-catalyzed strategy employing sulfoxonium ylides as the carbeneprecursor offers an effective and atom-economical functionalization of substrates of biological interest with only DMSO as the sole by-product. The strategy is scalable
Rh(III)-catalysed site-selective alkylation of β-carbolines/isoquinolines and tandem C H/C N functionalization to construct indolizine-indole frameworks
tolerance exploiting directing properties of pyridinic nitrogen. In this protocol, diazo compounds of diethylmalonate, dimethyl dimedone and oxindole are tested as carbene source with the release of environmentally benign N2 gas as the by-product. Moreover, to perceive mechanistic insights, ESI-MS studies were conducted, and the key intermediates associated with this transformation were identified. In
开发了铑催化的邻位选择性卡宾插入策略以激活β-咔啉和异喹啉支架的非酸性 sp 2 C H 键。这种转变利用吡啶氮的导向特性,使 C C 键的制造具有高原子经济性、良好的产率和广泛的官能团耐受性。在该协议中,丙二酸二乙酯、二甲基二甲酮和羟吲哚的重氮化合物作为卡宾源进行了测试,释放了对环境无害的 N 2气体作为副产品。此外,为了了解机理,进行了 ESI-MS 研究,并确定了与这种转变相关的关键中间体。此外,由合成的产物完成了平面多环中氮茚-吲哚骨架的无金属结构。此外,还确定了 C N 环状化合物的肿瘤和荧光特性。