Kokten, "Highly sensitive electrochemical determination of acetaminophen in pharmaceuticals by poly[2, 5-di(2-thiophenyl)-1-p-(
tolyl)pyrrole] modified pencil graphite electrode," IEEE Sensors Journal, vol.
In contrast, the nitroolefin bearing phenyl,
tolyl, and 4-chlorophenyl, afforded the corresponding Michael products in excellent yield (97%) (Table 2, entries 1, 2 and 4), while in the case of nitroolefin with 4-methoxyphenyl, the yield was slightly lower (84%) (Table 2, entry 3), which was probably attributed to the steric effect of the 4-methoxyphenyl group.
The IR spectra show the characteristic sharp band for v(C-O-C) and broad band for v(C=C) (
tolyl and benzyl ring stretching) in the ranges 1043-1015 and 1607-1581 [cm.sup.-1], respectively.
(51.) Lin, CH, Lin, HT, Chang, SL, Hwang, HJ, Hu, YM, Taso, YR, Su, WC, "Benzoxazines with
Tolyl, [rho]-hydroxyphenyl or [rho]-carboxyphenyl linkage and the Structure-Property Relationship of Resulting Thermosets." Polymer, 50 2264-2272 (2009)