ChemInform Abstract: Ball Milling for the Quantitative and Specific Solvent‐Free Knoevenagel Condensation + Michael Addition Cascade in the Synthesis of Various 2‐Amino‐4‐aryl‐3‐cyano‐4H‐chromenes Without Heating.

Abstract

Synthesis of Various 2-Amino-4-aryl--3-cyano-4H-chromenes Without Heating. -The environmentally benign reaction proceeds regioselectively with quantitative product yields and does not require organic solvents. -(QAREAGHAJ, O. H.; MASHKOURI, S.; NAIMI-JAMAL*, M. R.; KAUPP, G.; RSC Adv. 4 (2014) 89, 48191-48201, http://dx.

Solvent-free mechanochemical multicomponent preparation of 4H-pyrans catalyzed by Cu2(NH2-BDC)2(DABCO) metal-organic framework

“…In FT-IR spectra of the products, the significant band at around 2190 cm −1 is related to the CN stretching band, and the broad band at 3200-3400 cm −1 approves the presence of the NH 2 moiety (see Fig. 4 d) [ 50 ]. As shown in Fig.…”

“…As shown in Fig. 5 for the compound 6h , the characteristic H4 in 1 H NMR spectra of these compounds was appeared as a singlet above 4.0 ppm [ 50 ].

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