Ranadive, V. B.; Khadilkar, B. M.; Samant, S. D., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1994, vol. 33, p. 1175 - 1177
Potassium phthalimide-N-oxyl: a novel, efficient, and simple organocatalyst for the one-pot three-component synthesis of various 2-amino-4H-chromene derivatives in water
摘要:
A wide variety of 2-amino-4H-chromene derivatives with diverse substituents on the 4H-chromene ring were efficiently prepared via one-pot, three-component reaction of an aromatic aldehyde, malononitrile (or ethyl cyanoacetate), and diverse enolizable C-H activated acidic compounds in the presence of low loading of potassium phthalimide-N-oxyl (POPINO), as a new organocatalyst, in aqueous media. This procedure is a clean, transition metal-free, and environmentally friendly approach to prepare different 2-amino-4H-chromen derivatives that offers many advantages including short reaction time, high to quantitative yields, low cost, and straightforward work-up. (C) 2012 Elsevier Ltd. All rights reserved.
[EN] COMPOSITIONS CAPABLE OF INHIBITING REACTIVE OXYGEN AND CARBONYL SPECIES<br/>[FR] COMPOSITIONS CAPABLES D'INHIBER LES ESPECES A OXYGENE ET CARBONYLE REACTIFS
申请人:BAXTER INT
公开号:WO2006019855A1
公开(公告)日:2006-02-23
Therapeutic compositions are provided. The compositions include a single molecule that can display both antioxidant and carbonyl trapping properties. This can effectively reduce inflammation, oxidative stress and carbonyl stress, such as to prevent and/or treat cardiovascular disease and inflammatory diseases in kidney disease patients.
Constructing Quaternary Stereogenic Centers Using Tertiary Organocuprates and Tertiary Radicals. Total Synthesis of <i>trans</i>-Clerodane Natural Products
作者:Daniel S. Müller、Nicholas L. Untiedt、André P. Dieskau、Gregory L. Lackner、Larry E. Overman
DOI:10.1021/ja512527s
日期:2015.1.21
A new concise construction of trans-clerodane diterpenoids is reported in which oxacyclic and trans-hydronaphthalene fragments are coupled, and the critical C9-quaternary carbon stereocenter formed stereoselectively, by 1,6-addition of a tertiary cuprate or a tertiary carbon radical to β-vinylbutenolide. This strategy is specifically illustrated by total syntheses of (-)-solidagolactone (4), (-)-16-hydroxycleroda-3
The instant invention relates to new photolatent compounds of the formula I wherein R1 and R2 are each independently of the other C1-C10alkyl or C3-C8cycloalkyl, R3 is hydrogen or C1-C4alkyl, and wherein the photochemically cleaved group R4OH is selected from the group consisting of fragrances, UV absorbers, anti-microbials, anti-fogging agents and clarifiers; with the proviso that, when R1 and R2 are tert-butyl and R3 is hydrogen, R4 is not methyl or phenyl.
The instant invention relates to new photolatent compounds of the formula I wherein R
1
and R
2
are each independently of the other C
1
-C
10
alkyl or C
3
-C
8
cycloalkyl, R
3
is hydrogen or C
1
-C
4
alkyl, and wherein the photochemically cleaved group R
4
OH is selected from the group consisting of fragrances, UV absorbers, anti-microbials, anti-fogging agents and clarifiers; with the proviso that, when R
1
and R
2
are tert-butyl and R
3
is hydrogen, R
4
is not methyl or phenyl.