Recommanded Product: 4-Nitrobenzoic acid. In 2019.0 EUR J ORG CHEM published article about DIELS-ALDER REACTION; ALPHA,BETA-UNSATURATED ALDEHYDES; ENANTIOSELECTIVE SYNTHESIS; 1,3-DIPOLAR CYCLOADDITIONS; ORGANOCATALYTIC 4+2; NATURAL-PRODUCTS; CONSTRUCTION; CATALYSIS; AMINE; DESIGN in [Muthusamy, Subramaniam; Kesavan, Venkitasamy] Indian Inst Technol Madras, Chem Biol Lab, Dept Biotechnol, Bhupat & Jyothi Mehta Sch Biosci Bldg, Chennai 600036, Tamil Nadu, India in 2019.0, Cited 104.0. The Name is 4-Nitrobenzoic acid. Through research, I have a further understanding and discovery of 62-23-7.
An asymmetric [3 + 2] formal cycloaddition reaction between oxindole alpha-keto esters and enals has been developed. This alpha,gamma-regioselective reaction afforded multifunctional carbocyclic oxindoles via dienamine-enamine cascade reaction followed by isomerization. Furthermore, a highly enantioselective Diels-Alder reaction was demonstrated between 2,4-dienals and oxindole alpha-keto esters via trienamine intermediates. Chiral secondary amine catalyzed the both reactions under mild conditions and the cyclized products were isolated in moderate to good yields with good diastereoselectivities (>20:1 dr) and enantioselectivities (up to 99 %).
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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem