Sep 142018
1-(4-Cyanophenyl)piperazine
1-(4-Cyanophenyl)piperazine (1a).1 Isolated as a mixture of mono (1a) and di (3) arylated products ~9:1. Conversion: quantitative. Peaks attributed to 1a: 1H NMR (400 MHz, CD3Cl) δH 7.47 (m, 2H, arH), 6.83 (m, 2H, ar-H), 3.26 (m, 4H, pip-H), 2.99 (m, 4H, pip-H), 1.69 (br s, 1H, NH). Peaks attributed to 3: 7.52 (d, J = 9.0 Hz, 4H, ar-H), 6.88 (d, J = 9.0 Hz, 4H, ar-H), 3.29 (s, 8H, pip-H).
Org. Process Res. Dev., Article ASAP
DOI: 10.1021/acs.oprd.8b00090
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https://pubs.acs.org/doi/suppl/10.1021/acs.oprd.8b00090/suppl_file/op8b00090_si_001.pdf
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