A vicarious, one-pot synthesis of benzo- and naphthofurans: Applications to the syntheses of stereumene B and paeoveitols
作者:Showkat Rashid、Bilal A. Bhat、Goverdhan Mehta
DOI:10.1016/j.tetlet.2019.03.037
日期:2019.4
deviation during attempted Tanabe γ-lactone annulation on 4-hydroxycyclohexanones has led to a general, one-potsynthesis of benzofurans and naphtho[2,3–b]furans from readily assembled precursors. The utility of this adaptable methodology has been demonstrated through concise syntheses of natural products, stereumene B, paeoveitol D and (±)-paeoveitol.
有趣的是,在尝试在4-羟基环己酮上进行田边γ-内酯环化过程中出乎意料的偏差,导致了从易组装的前体中普遍进行一锅法合成苯并呋喃和萘并[2,3- b ]呋喃的过程。通过天然产物,立体异构体B,paeoveitol D和(±)-paeoveitol的简明合成,已证明了这种适应性方法的实用性。
Metal- and Reagent-Free Anodic C−C Cross-Coupling of Phenols with Benzofurans leading to a Furan Metathesis
作者:Sebastian Lips、Bernardo Antonio Frontana-Uribe、Maurice Dörr、Dieter Schollmeyer、Robert Franke、Siegfried R. Waldvogel
DOI:10.1002/chem.201800919
日期:2018.4.20
Heterobiaryls consisting of a phenol and a benzofuran motif are of significant importance for pharmaceutical applications. An attractive sustainable, metal‐ and reagent‐free, electrosynthetic, and highly efficient method, that allows access to (2‐hydroxyphenyl)benzofurans is presented. Upon the electrochemical dehydrogenative C−C cross‐couplingreaction, a metathesis of the benzo moiety at the benzofuran
Palladium(II)-Catalyzed Transformation of 3-Alkylbenzofurans to [2,3′-Bibenzofuran]-2′(3′H)-ones: Oxidative Dimerization of 3-Alkylbenzofurans
作者:Beom Shin Cho、Young Keun Chung
DOI:10.1021/acs.joc.6b02864
日期:2017.2.17
An unprecedented oxidative dimerization by palladium catalysis has been developed using PhI(OPiv)2 as a by-standing oxidant. This provides a facile method for the synthesis of quaternary 2,3′-bibenzofuran-2′(3′)-ones from readily accessible substrates. A plausible mechanism involving a Pd(II)–Pd(IV) catalytic cycle is proposed; a trace amount of water is required for subsequent oxidation.
4,7-Diacyloxybenzofuran derivatives of Formula I, are disclosed. These compounds are useful as inhibitors of mammalian leukotriene biosynthesis. As such, these compounds are useful therapeutic agents for treating allergic conditions, asthma, cardiovascular disorders, inflammation, psoriasis and allergic conjunctivitis. The compounds are also useful as analgesics and as cytoprotective agents.
HETEROCYCLIC COMPOUNDS AND EXPANSION AGENTS FOR HEMATOPOIETIC STEM CELLS
申请人:Nishino Taito
公开号:US20120128640A1
公开(公告)日:2012-05-24
An expansion agent for hematopoietic stem cells and/or hematopoietic progenitor cells useful for improvement in the efficiency of gene transfer into hematopoietic stem cells for gene therapy useful for treatment of various disorders is provided.
An expansion agent for hematopoietic stem cells and/or hematopoietic progenitor cells containing a compound represented by the formula (I) (wherein X, Y, Z, Ar
1
, R
1
, R
2
, R
3
, R
4
, R
5
, R6 and R
7
are as defined in the description), a tautomer, prodrug or pharmaceutically acceptable salt of the compound or a solvate thereof, which can expand hematopoietic stem cells and/or hematopoietic progenitor cells.