in Scheme 3. Reactions of MBH ketone 1a with 2-amino-6-chlorobenzothiazole (2b) and 2-amino-6methyl benzothiazole (2c) under the optimal reaction conditions, afforded excellent yields of the desired products 3b & 3c respectively. Next, a substantial outcome could be obtained from the reactions of MBH ketones containing electron-donating groups with the substrates bearing different functionalities 2a-2c.