CHLOROSULFONATION OF SOME CRISSCROSS CYCLOADDUCTS FROM ISOCYANATES AND DIARYL AZINES
作者:Richard J. Cremlyn、Richard M. Ellam、Sultan Farouk
DOI:10.1080/10426500008042109
日期:2000.6.1
isocyanate (3) however, both 7a and 7d gave the 1: 1 adducts (14). whereas 7c gave a different 2: 1 adduct (15). Treatment of 14a with 1 gave the ureide 16. With both methyl isocyanate (4) and phenyl isocyanate (S), 7a gave the expected crisscross adducts (17a and b), and 7c with 5 similarly gave 17c. When 7a was treated with 1 followed by aqueous potassium iodide, the diureide (10) was formed; concentrated