2-substituted 5,6-dihydro-1,3-thiazines from nitriles and thiocyanates: A modification of Meyers's method
The thiazines (4)-(13). were prepared in high yields from corresponding nitriles or thiocyanates and 4-mercapto-2-methyIbutan-2-ol (2) in methanesulfonic acid. The use of thiocyanates for preparing 2-sulfur-substituted thiazines is reported herein apparen