反应详情

The equipment was the same as used in Example 26. 3.0 g (0.01 mole) 1,3-di-n-heptyl-2-S-ethyl isothiourea was mixed with 30 ml of methylene chloride. Two drops of triethylamine and 1 drop of dibutyltindilaurate were added to the mixture followed by 1.0 g (0.01 mole) tert-butyl isocyanate. The temperature rose from 24° to 39° C. The reaction mixture was stirred overnight at ambient temperature and then heated for one-half hour at 35° to 40° C. to complete the reaction. The reaction mixture was vacuum evaporated to produce 3.83 g (96 weight percent of theory yield) of a clear liquid having a nD30 of 1.4750. The product was identified as the title product by IR and NMR spectra analyses. Compound No. 40 in Table I.

1. customrose from 24° to 39° C
2. temperatureheated for one-half hour at 35° to 40° C.
3. customthe reaction
4. customevaporated
5. customto produce
6. custom3.83 g (96 weight percent of theory yield) of a clear liquid