Synthesis of trisubstituted 1,3-oxazin-6-ones via base-catalyzed ring-opening annulation of cyclopropenones with N-(pivaloyloxy)amides
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DOI: 10.1016/j.tetlet.2018.02.084
Abstract: Abstract The base-catalyzed [3+3]-type annulation between cyclopropenones and N-(pivaloyloxy)amides is reported. The formal insertion of a 1,3-N,O-dipole into a cyclopropenone C C bond yields a six-membered azalactone structure. In the presence of catalytic K2CO3 at… read more here.
Keywords: oxazin ones; trisubstituted oxazin; pivaloyloxy amides; cyclopropenones pivaloyloxy ... See more keywords
Ag(I)-Catalyzed [3 + 2]-Annulation of Cyclopropenones and Formamides via C-C Bond Cleavage.
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DOI: 10.1021/acs.orglett.8b02612
Abstract: An unprecedented Ag-catalyzed [3 + 2]-annulation of cyclopropenones and DMF via C-C bond cleavage is disclosed. This protocol exhibited excellent chemo- and regio-selectivity, and tolerated various functional groups. More importantly, DMF served as the C═O… read more here.
Keywords: bond; bond cleavage; via bond; annulation cyclopropenones ... See more keywords