Synthesis of Poly-2-(2-hydroxybenzylideneamino) -6-phenyl-4,5,6,7-tetrahydrobenzo[b]thiophene-3- carbonitrile
In the IR spectrum of 2-amino-4,5,6,7- tetrahydro-6-phenylbenzo[b]thiophene-3- carbonitrile, the characteristic peaks are at 3308 and 3206 [cm.
For best reaction condition, a representative reaction affording 2-amino-7, 7-dimethyl-2', 5-dioxo-5, 6, 7, 8- tetrahydrospiro [chromene-4, 3'-indoline]-3- carbonitrile
4j was investigated in the presence of different amounts of DABCO in H2O at 75C.
2-Amino-7,7-dimethyl-2',5-dioxo-5,6,7,8- tetrahydrospiro[chromene-4,3'-indoline]-3- carbonitrile