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. 2021 Aug 27;13(17):2875. doi: 10.3390/polym13172875

Table 1.

Synthesis of 4-(3-bromophenyl)-1H-pyrazole-blocked TDI adduct.

S. No. TDI
Gram
× 10−4 		Blocking Agent (Gram) Adduct
(Gram)		 Solvent Reflux Time (Hour) Catalyst DBTDL
(wt.%)		 Yield (%)
1. 3.9 0.10 0.13 CHCl3 3.0 0.85 91
2. 3.9 0.10 0.12 CHCl3 3.0 0.65 85
3. 3.9 0.10 0.12 CHCl3 3.0 0.50 88
4. 3.9 0.10 0.11 CHCl3 3.0 1.0 81