Z-TRP-ONP

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The procedure of Example 1 is repeated using 5.33 g (25 mmole) of N,N-dibenzylhydroxylamine and 4.48 g (25 mmole) of N-cyclohexylmaleimide. The residue was crystallized from ethanol to give 6.0 g (61%) of a white solid, mp 75°-77° C. The residue was crystallized from ethanol

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In accordance with the procedures of Comparative example 1, the reactions were conducted by using 0.05 mol of N-Cyclohexylmaleamic acid, 0.15 mol of alcohols and 0.025 mol of conc. sulfuric acid. The yields (mol%) of N-cyclohexylmaleimide based on N-cyclohexylmaleamic acid are listed in Table 2.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The following amounts of reagents were weighed into glass tube under ambient temperature: 12 mg (8.37×10−2 mmol) of CuBr, 0.45 mL (0.41 g, 4.4 mmol) of deinhibited styrene, 0.72 g (4.4 mmol) N-cyclohexyl maleimide, 60 mg (0.175 mmol) 4,4′-di-(5-nonyl)-2,2′-bipyridine, and 12 μL (8.8×10−2 mmol) 1-phenylethyl bromide. Two “freeze-pump-thaw” cycles were performed on the content of tube in order to ensure that oxygen was removed from the polymerization solution. The tube was sealed under vacuum and placed in an oil bath thermostated at 110° C. After 7 h the tube was broken and the contents dissolved in 10 mL of THF. Conversion of the monomer, measured using GC was 98% for both monomers, and the molecular weight and polydispersity measured by GPC were Mn=4700, and Mw/Mn=1.22. From 1H NMR spectrum the content of styrene in copolymer was 50%. DSC measurement showed one Tg=270° C. The initial temperature of decomposition of the alternating copolymer determined from TGA was 430° C. The following amounts of reagents were weighed into glass tube under ambient temperature Two “freeze-pump-thaw” cycles were performed on the content of tube in order was removed from the polymerization solution The tube was sealed under vacuum placed in an oil bath at 110° C the contents dissolved in 10 mL of THF was 430° C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The procedure of Example 1 is repeated using 11.95 grams of 2,6-di-tert-butyl-4-mercaptophenol, 8.96 grams of N-cyclohexylmaleimide, and 0.5 grams of triethylamine. The residue is recrystallized from a heptane-toluene mixture to give 10.5 grams of a white solid, m.p. 94°-98° C. The residue is recrystallized from a heptane-toluene mixture