Formation of a novel thiopyranoindole ring system
The novel thiopyran[2,3,4-c,d]indole ring system (e.g.3) has been prepared from a substituted indole by intramolecular cyclisation of a t-BuS group onto an allyl substituent. The reaction occurs in high yield under the influence of protic acids, Lewis acids or electrophiles (Br2, I2, Hg(OAc)2). © 1992.
Hutchinson, JH; McEachern, EJ; Scheigetz, J; Macdonald, D; Thérien, M
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