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Upstream product

• 607-69-2 2-chloro-4(3H)-quinazolinone 
• 320778-92-5 (1R,2R)-N,N-dimethylcyclohexane-1,2-diamine 
• 607-68-1 2,4-dichloroquinazoline 
• 1234860-01-5 (1R,2R)-N₁,N₁-dimethylcyclohexane-1,2-diamine bishydrochloride 
• 877677-96-8 N-[(1R,2R)-2-(dimethylamino)cyclohexyl]benzamide 
• 86-96-4 1,2,3,4-tetrahydro-quinazoline-2,4-dione 
• 118-92-3 anthranilic acid 
• 607-69-2 2-chloroquinazolin-4(1H)-one 

Relevant academic research and scientific papers

Design and development of bioinspired guanine-based organic catalyst for asymmetric catalysis

Design, preparation, and studies of a family of new organic catalysts are presented. The design of the catalysts is inspired by the ability of DNA nucleobases to develop precise and explicit hydrogen bonds. We have shown that this phenomenon can be used to create a useful organic catalyst that demonstrates a recognition pattern similar to those of common organic substrates. A selected bifunctional catalyst based on a guanine structure has been shown to catalyze the conjugate addition of 1,3-dicarbonyl compounds to various nitroalkenes, providing the products in good yields and enantioselectivities.

COMPOUND HAVING HETERO RING SKELETON, AND PROCESS FOR PRODUCING OPTICALLY ACTIVE COMPOUND USING THE AFOREMENTIONED COMPOUND AS ASYMMETRIC CATALYST

The present invention provides a compound having a heterocyclic skeleton, which is represented by of the formula (I) : wherein R1 and R2 are the same or different and each is a lower alkyl group optionally having substituent(s), an a

Bifunctional hydrogen-bond donors that bear a quinazoline or benzothiadiazine skeleton for asymmetric organocatalysis

Hydrogen-bond (HB)-donor catalysts that bear a 2-aminoquinazolin-4-(1H)-one or a 3-aminobenzothiadiazine-1,1-dioxide skeleton have been developed, and it has been shown that these catalyst motifs act similarly to other HB-donor catalysts such as thioureas. The highly enantioselective hydrazination of 1,3-dicarbonyl compounds was realized even at room temperature with up to 96 % ee for 2-aminoquinazolin-4-(1H)-one-type catalysts, which were more effective than the corresponding urea and thiourea catalysts. In addition, benzothiadiazine-1,1-dioxide-type catalysts were shown to promote the isomerization of alkynoates to allenoates with high enantioselectivity. To overcome the problem that the products were obtained as mixtures with the starting alkynoates, we developed the tandem isomerization and cycloaddition of alkynoates for the synthesis of advanced chiral compounds such as bicyclo[2.2.1]heptenes and 3-alkylidene pyrrolidine without a significant loss of enantioselectivity.