Synthesis of benzo [b] phenanthro [d] thiophenes

R Pratap, ML Lee, RN Castle

Index: Pratap, Ram; Lee, Milton L.; Castle, Raymond N. Journal of Heterocyclic Chemistry, 1982 , vol. 19, p. 219 - 220

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Citation Number: 15

Abstract

Abstract The synthesis of benzo [b] phenanthro [1, 2-d] thiphene (1), benzo [b] phenanthro [4, 3-d] thiophene (2), benzo-[b] phenanthro [2, 1-d] thiophene (3) and benzo [b] phenanthro [3, 4-d] thiophene (4) from appropriately substituted olefines by photochemical cyclodehydrogenation is described. The photolysis of olefin 9 gave a mixture of 4 and anthra [1, 2-b] benzo [d] thiophene (5).