A <i>para</i>
-C-H Functionalization of Aniline Derivatives via In situ Generated Bulky Hypervalent Iodinium Reagents
作者:Chao Tian、Xu Yao、Weizhe Ji、Qian Wang、Guanghui An、Guangming Li
DOI:10.1002/ejoc.201801058
日期:2018.11.25
A general para‐selective C‐H functionalization was achieved via a stericcontrol strategy. Para‐iodo, bromo, chloro, nitro, and trifluormethyl aniline derivatives were prepared via in situ generated, bulky hypervalent iodinium reagents in as little as 10 min. Products can be purified without column chromatography or recrystallization, which significantly reduces the waste and simplifies the work‐up
Synthesis of 9-methyl-1H-[1,4]thiazino[3,2-g]quinoline-2,5,10(3H)-trione, the B,C,D ring core of the shermilamine alkaloids
作者:Norman O. Townsend、Yvette A. Jackson
DOI:10.1039/b307124c
日期:——
Synthesis of 9-methyl-1H-[1,4]thiazino[3,2-g]quinoline-2,5,10(3H)-trione (4), from N-(4-bromo-2,5-dimethoxyphenyl)acetamide (23) is described. Oxidative cyclisation of 2,2'-disulfanediylbis[N-(2,5-dimethoxyphenyl)acetamide] (19) to 5,8-dimethoxy-2H-1,4-benzothiazin-3(4H)-one (7b) is also reported.
The first totalsynthesis of abenquines A, B2, C and D has been achieved in three steps starting from commercially available 2,5-dimethoxyaniline, with overall yields of 41–61%. Four analogues bearing the amino acids d-valine (17), l-methionine (18), and glycine (19), and benzylamine (20), were also prepared in 45–72% yield. The inhibitory properties of these compounds were evaluated against the photoautotrophic
Process for preparing 4-amino-2,5-dialkoxybenzonitriles
申请人:Hoechst Aktiengesellschaft
公开号:US03933887A1
公开(公告)日:1976-01-20
A process for preparing 4-amino-2,5-di-(C.sub.1 -C.sub.4) alkoxybenzonitriles which comprises brominating 1-acylamino-2,5-dialkoxybenzenes, converting the 1-acylamino-2,5-dialkoxy-4-bromobenzenes so obtained by the reaction with copper-I-cyanide to the 4-acylamino-2,5-dialkoxy-benzonitriles and subsequently hydrolyzing the acylamino group; the known compounds are prepared by means of this process in better yields and in a technically simpler way.
The invention relates to compounds of formula (I) or formula (II) which have anti-inflammatory activity and comprise a new class of NSAIDs. The compounds are therefore useful for treating inflammatory diseases or disorders. The invention also relates to pharmaceutical compositions containing these compounds, as well as methods of treating inflammatory diseases or disorders using compounds of formula (III) or formula (IV).