Generation and intramolecular cyclization of (2-ethenylphenyl)bisketenes. Synthesis of benzofuranones
摘要:
Several new differentially substituted cyclobutenediones 4a-e have been prepared. Their thermal rearrangement to substituted naphthofuranones 5a-d is reported. This rearrangement involves an unprecedented intramolecular cyclization of a reactive bisketene 6, and forms the naphthofuranone system in good yield. (C) 1998 Elsevier Science Ltd. All rights reserved.
A chemoselective domino annulation reaction of β-naphthols with methyl aryldiazoacetate is described. The gold catalyst promoted C–H functionalization of β-naphthols, whereas a rhodium or copper complex led to O–H insertion reactions. Consecutive intramolecular lactonization occurred after site-selective alkylation at the 1-position of β-naphthol, providing functionalized naphthofuranone derivatives
A polarizer protective film comprising: a cellulose ester; a saccharide ester having an ester of compound (A), the compound (A) having one furanose structure or one pyranose structure in the molecule, wherein all or a part of OH groups in the compound (A) are esterified, or an ester of compound (B), the compound (B) having two to twelve of at least one of a furanose structure and a pyranose structure bonded in the molecule, wherein all or a part of OH groups in the compound (B) are esterified; and a compound represented by Formula (R) or (Ra):
Peroxidation and Skeletal Rearrangement for the Synthesis of Dioxole‐2‐Carboxamide Derivatives under Continuous‐Flow Conditions
作者:Akash S. Ubale、Moseen A. Shaikh、Nirmala Mohanta、Boopathy Gnanaprakasam
DOI:10.1002/adsc.202300591
日期:2023.9.19
Herein, we report peroxidative dearomatization of 2-naphthol and C−H peroxidation of 3-arylbenzofuran-2-ones with 66–94% yield under catalyst-free conditions using continuous flow module. Besides, an approach for the synthesis of N-substituted-2-phenylbenzo[d][1,3]dioxole-2-carboxamide has been achieved via the skeletalrearrangement of peroxybenzofuranone using amines in the absence of catalyst under
在此,我们报道了使用连续流模块在无催化剂条件下进行 2-萘酚的过氧化脱芳构化和 3-芳基苯并呋喃-2-酮的 C−H 过氧化,产率达 66-94%。此外,在连续流动下,通过过氧苯并呋喃酮的骨架重排,在没有催化剂的情况下,实现了合成N-取代-2-苯基苯并[ d ][ 1,3 ]二氧杂环戊烯-2-甲酰胺的方法。机理研究表明,这种过氧化反应是在热解条件下通过自由基形成进行的。
POLARIZING PLATE PROTECTION FILM, METHOD FOR PRODUCING THE SAME, POLARIZING PLATE AND LIQUID CRYSTAL DISPLAY
申请人:Konica Minolta Opto, Inc.
公开号:EP2012150A1
公开(公告)日:2009-01-07
Disclosed is a polarizing plate protection film characterized by containing a sugar ester compound, a cellulose ester and a compound represented by the general formula (R) or (Ra) below. The sugar ester compound is obtained by esterifying a part or all of the OH groups in a compound (A) having one furanose structure or pyranose structure or in a compound (B) wherein not less than 2 but not more than 12 of at least either of the furanose structures or the pyranose structures are bonded.