Stream-lined synthesis of 3-hydroxy-β-lactams: Norrish-Yang type II photocyclizations of β-ketoformamides
Sign Up to like & getrecommendations! Published in 2018 at "Tetrahedron"
DOI: 10.1016/j.tet.2018.04.040
Abstract: Abstract A photochemical approach to 3-phenyl-3-hydroxy-β-lactams (3-HβLs) is reported. Irradiation of aryl-β-ketoformamides with a UV light band centered at 300 nm provides the corresponding 3-aryl-3-HβLs with good conversion. The scope of the photocyclization is explored with… read more here.
Keywords: norrish yang; stream lined; yang type; hydroxy lactams ... See more keywords
The tetraalkylammonium-accelerated Norrish-Yang photocyclization of 2-substituted acetophenones
Sign Up to like & getrecommendations! Published in 2019 at "Tetrahedron Letters"
DOI: 10.1016/j.tetlet.2019.05.005
Abstract: Abstract The tetrabutylammonium-accelerated Norrish-Yang cyclization of 2-ethoxycarbonylmethyloxy- and 2-cyanomethyloxyacetophenones afforded trans -dihydrobenzofuranols in good stereoselectivities through cation-π interactions between the ammonium and the carbonyl and cyano groups. Furthermore, a new type of organocatalyst possessing both… read more here.
Keywords: tetraalkylammonium accelerated; accelerated norrish; norrish yang; yang photocyclization ... See more keywords