83540-57-2

Upstream product

• 2033-24-1 cycl-isopropylidene malonate 
• 100-11-8 1-bromomethyl-4-nitro-benzene 

Downstream Products

• 1357486-37-3 2,2-bis(4-nitrobenzyl)malonaldehyde 
• 653307-42-7 2,2-bis(4-nitro-benzyl)-1,3-propanediol 
• 653306-99-1 2,2-bis(4-nitrobenzyl)malonic acid 

Relevant academic research and scientific papers

Selective stabilization of self-assembled hydrogen-bonded molecular capsules through π-π Interactions

Subtle noncovalent forces such as π-π interactions play an import role in the folding of biological macromolecules such as DNA and proteins. We describe here a system where such interactions on the outside of a molecular capsule trigger a selective change of its structure as a self-assembled receptor.

Complimentary polymer electrochromic device

A complimentary polymer or “dual-polymer” electrochromic device and methods of preparing the same are provided.

COMPLIMENTARY POLYMER ELECTROCHROMIC DEVICE

A complimentary polymer or “dual-polymer” electrochromic device and methods of preparing the same are provided.

PHOTOCROSSLINKABLE MATERIALS COMPRISING ALICYCLIC GROUP

A diamine compound of formula (I) is proposed as well as polymers, copolymers, polyamic acids, polyamic acid esters, or polyimides based on such compound.

Photocrosslinkable materials

A diamine compound of formula (I) is proposed as well as polymers, copolymers, polyamic acids, polyamic acid esters, or polyimides based on such compound.

Meldrum's acids as acylating agents in the catalytic intramolecular Friedel-Crafts reaction

(Chemical Equation Presented) The intramolecular Friedel-Crafts acylation of aromatics with Meldrum's acid derivatives catalyzed by metal trifluoromethanesulfonates is reported. Meldrum's acids are easily prepared, functionalized, handled, and purified. The synthesis of polysubstituted 1-indanones from benzyl Meldrum's acids was investigated thoroughly, and it was shown that a variety of catalysts were effective, while accommodating a diversity of functional groups under mild conditions. The scope, limitations, and functional group tolerance (terminal alkene and alkyne, ketal, dialkyl ether, dialkyl thioether, aryl methyl ether, aryl TIPS and TBDPS ethers, nitrile- and nitro-substituted aryls, alkyl and aryl halides) for a variety of 5-benzyl (enolizable Meldrum's acids) and 5-benzyl-5-substituted Meldrum's acids (quaternized Meldrum's acids), forming 1-indanones and 2-substituted-1- indanones, respectively, are delineated. This method was further applied to the synthesis of 1-tetralones, 1-benzosuberones, and the potent acetylcholinesterase inhibitor donepezil. Rate of cyclization as a function of ring size was established for various benzocyclic ketones via competition experiments: 1-tetralones form faster than both 1-indanones and 1-benzosuberones, and 1-benzosuberones cyclize faster than 1-indanones.

PHOTOACTIVE MATERIALS

Diamine compounds, which in particular are useful as precursors for the production of liquid crystal alignment layers, represented by general formula (I), wherein A1 represents an organic group of 1 to 40 carbon atoms; A2 represents

Organic reactions in ionic liquids: Alkylation of Meldrum's acid

The room temperature ionic liquid N-butylpyridinium tetrafluoroborate, [bpy]BF4 is used as a "green" recyclable alternative to classical molecular solvents for the alkylation of Meldrum's acid.