1.trans o-methoxystilbene and its derivatives 47a-f had been studied by means of pyrolysis and photolysis. Under pyrolytic conditions, compounds 47a-f gave not only the expected products 52a,c-f, but also their corresponding isomers 53a,c-f . Furthermore, compound 47b gave naphthalene (63) as the major product by opening the furan ring at higher temperature. Under photolytic conditions, compounds 47a-f gave the expected photocyclic products 2a-f and 109a-f.2.Pyrolytic chemistry of N-(N-Methyl-3-indolyl)methyl benzamide (45) hes been studied. Pyrolysis of 45 gave 3-methyl quinoline (38), 4-methyl quinoline (39) and secondary pyrolysis product quinoline (36). 2.Pyrolytic chemistry of N-(N-Methyl-3-indolyl)methyl benzamide (45) hes been studied. Pyrolysis of 45 gave 3-methyl quinoline (38), 4-methyl quinoline (39) and secondary pyrolysis product quinoline (36).