Recent advances in radical-mediated [2+2+m] annulation of 1,n-enynes
Sign Up to like & getrecommendations! Published in 2019 at "Science China Chemistry"
DOI: 10.1007/s11426-019-9615-0
Abstract: 1,n-Enynes are a versatile class of unsaturated hydrocarbons that find broad applications in the synthetic community of natural products, biologically active structures and functional materials. Typical methods for the transformations of 1,n-enynes include the radical-mediated… read more here.
Keywords: annulation enynes; mediated annulation; radical mediated; advances radical ... See more keywords
Regioselective Synthesis of Pyrazolo[1,5-a]pyridine via TEMPO-Mediated [3 + 2] Annulation-Aromatization of N-Aminopyridines and α,β-Unsaturated Compounds.
Sign Up to like & getrecommendations! Published in 2022 at "Organic letters"
DOI: 10.1021/acs.orglett.2c00035
Abstract: A TEMPO-mediated [3 + 2] annulation-aromatization protocol for the preparation of pyrazolo[1,5-a]pyridines from N-aminopyridines and α,β-unsaturated compounds was developed. The procedure offered multisubstituted pyrazolo[1,5-a]pyridines in good to excellent yield with high and predictable regioselectivity. The… read more here.
Keywords: annulation aromatization; aminopyridines unsaturated; tempo mediated; unsaturated compounds ... See more keywords
1,6-Conjugated addition-mediated [4 + 1] annulation: an approach to 2,3-dihydrobenzofurans
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DOI: 10.1039/c7qo00846e
Abstract: A formal 1,6-conjugated addition-mediated [4 + 1] annulation of ortho-hydroxyphenyl-substituted para-quinone methides with sulfonium or ammonium bromides has been described. This domino-type process offered an efficient method for the synthesis of 2,3-dihydrobenzofurans in good yields,… read more here.
Keywords: conjugated addition; addition mediated; mediated annulation; annulation approach ... See more keywords
DABCO-mediated [3+3] annulation of para-quinamines: access to functionalized 1,2,4-triazinone derivatives.
Sign Up to like & getrecommendations! Published in 2019 at "Chemical communications"
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