2-Isocyanato-4-methylthiophene → 1,3-di-n-heptyl-1-N-4-methylthiophenylcarbamyl-2-S-ethyl isothiourea

Participants

Reaction Steps

The equipment was the same as in Example 26 above. 3.0 g (0.01 mole) 1,3-di-n-heptyl-2-S-ethyl isothiourea was mixed with 25 ml of methylene chloride. Two drops of triethylamine and 1 drop of dibutyltindilaurate were added and then 1.65 g (0.01 mole) 4-methyl thiophenyl isocyanate was added. The temperature rose from 23° to 33°. The reaction mixture was then vacuum evaporated to remove the methylene chloride to produce 4.65 g (100 percent of theory yield) of a yellow liquid having a nD30 of 1.5340. The liquid solidified on standing into a semi-solid. The product was identified as the title product by IR and NMR spectra analyses. Compound No. in Table 47 in Table I.

Provenance & Evidence