Synthesis of 2H-1-Benzopyrans by Pd-Catalyzed Cyclization of <i>o</i>-Allylic Phenols
作者:Richard C. Larock、Lulin Wei、Timothy R. Hightower
DOI:10.1055/s-1998-1709
日期:1998.5
Derivatives of 2H-1-benzopyran (1), also known as chromenes, are prominent natural products of many genera of the Asteraceae possessing a wide range of valuable physiological activities. They are also useful intermediates in the synthesis of complex natural products, such as pterocarpans.
Thieme Chemistry Journal Awardees - Where
Are They Now? Microwave-Assisted Rhodium-Catalyzed Decarbonylation
of Functionalized 3-Formyl-2<i>H</i>-chromenes:
A Sequence for Functionalized Chromenes like Deoxycordiachromene
作者:Stefan Bräse、Manuel Bröhmer、Nicole Volz
DOI:10.1055/s-0029-1217179
日期:——
3-Formyl-2H-chromenes which are readily accessible through an oxa-Michael reaction of salicylaldehydes and α,β-unsaturated aldehydes undergo a smooth decarbonylation reaction upon treatment with rhodium catalysts. With our method, a great variety of functionalized chromenes is accessible in a two-step sequence from salicylaldehydes.
Shifting Chemical Equilibria in Flow-Efficient Decarbonylation Driven by Annular Flow Regimes
作者:Bernhard Gutmann、Petteri Elsner、Toma Glasnov、Dominique M. Roberge、C. Oliver Kappe
DOI:10.1002/anie.201407219
日期:2014.10.20
chemical reactions, it is often necessary to influence an equilibrium by removing one or more components from the reaction space. Such manipulation is straightforward in open systems, for example, by distillation of a volatile product from the reaction mixture. Herein we describe a unique high‐temperature/high‐pressure gas/liquid continuous‐flow process for the rhodium‐catalyzed decarbonylation of
[EN] SUBSTITUTED CYCLOLAKYLS AS MODULATORS OF THE INTEGRATED STRESS PATHWAY<br/>[FR] CYCLOLALKYLES SUBSTITUÉS EN TANT QUE MODULATEURS DE LA VOIE DE STRESS INTÉGRÉE
申请人:CALICO LIFE SCIENCES LLC
公开号:WO2020223536A1
公开(公告)日:2020-11-05
Provided herein are compounds, compositions, and methods useful for modulating the integrated stress response (ISR) and for treating related diseases, disorders and conditions.
本文提供了用于调节综合应激反应(ISR)并治疗相关疾病、疾病和症状的化合物、组合物和方法。
Synthesis of 2<i>H</i>-Chromenes via Hydrazine-Catalyzed Ring-Closing Carbonyl-Olefin Metathesis
作者:Yunfei Zhang、Janis Jermaks、Samantha N. MacMillan、Tristan H. Lambert
DOI:10.1021/acscatal.9b03656
日期:2019.10.4
The catalytic ring-closing carbonyl-olefin metathesis (RCCOM) of O-allyl salicylaldehydes to form 2H-chromenes is described. The method utilizes a [2.2.1]-bicyclic hydrazine catalyst and operates via a [3 + 2]/retro-[3 + 2] metathesis manifold. The nature of the allyl substitution pattern was found to be crucial, with sterically demanding groups such as adamantylidene or diethylidene offering optimal