Ruthenium(II) Catalyzed Regiospecific C–H/O–H Annulations of Directing Arenes via Weak Coordination
2015
Banerjee, Arghya | Santra, Sourav Kumar | Mohanta, Prakash Ranjan | Patel, Bhisma K.
Ruthenium(II) catalyzed oxidative C–H/O–H annulations have been demonstrated using two different directing arenes viz. 2-arylquinolinone and 2-arylbenzoxazinone with internal alkynes. Regiospecific annulations have been observed for both directing arenes via the assistance of weaker carbonyl oxygen in the presence of a stronger nitrogen-directing site. In this substrate-controlled convergent protocol the weaker directing group dictates the annulation path.
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