Microwave Irradiation for Accelerating each Step for the Synthesis of 1,2,4-Triazino[5,6-b]indole-3-thiolsand their Derivatives from Isatin and 5-Chloroisatin - El Ashry, El Sayed H; Ramadan, El Sayed; Hamid, Hamida M Abdel; Hagar, Mohamed (Synlett, 2004)