DABCO-mediated [3+3] annulation of para-quinamines: access to functionalized 1,2,4-triazinone derivatives.
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DOI: 10.1039/c9cc05276c
Abstract: An unprecedented [3+3]-annulation of p-quinamines and nitrile imines was developed, affording a series of 1,2,4-triazinone derivatives in moderate to excellent yields with excellent diastereoselectivity. This cycloaddition expands the scope of p-quinamines to the construction of… read more here.
Keywords: annulation; triazinone derivatives; mediated annulation; dabco mediated ... See more keywords
Efficient synthesis of 4-sulfanylcoumarins from 3-bromo-coumarins via a highly selective DABCO-mediated one-pot thia-Michael addition/elimination process
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DOI: 10.1039/c9ra09545d
Abstract: A facile and efficient protocol for the highly selective direct sulfanylation of 3-bromocoumarins under DABCO promotion, was developed. The transformation took place with aromatic and aliphatic thiols as well as with α,ω-dithiols, affording the expected… read more here.
Keywords: dabco mediated; highly selective; thia michael; addition ... See more keywords