[EN] SPIRO-OXADIAZOLINE COMPOUNDS AS AGONISTS OF α-7-NICOTINIC ACETYLCHOLINE RECEPTORS [FR] COMPOSÉS SPIRO-OXADIAZOLINE EN TANT QU'AGONISTES DES RÉCEPTEURS DE L'ACÉTYLCHOLINE Α-7 NICOTINIQUE
Chemodivergent Synthesis of Oxazoles and Oxime Ethers Initiated by Selective C–N/C–O Formation of Oximes and Diazo Esters
作者:Zhenjie Qi、Shaozhong Wang
DOI:10.1021/acs.orglett.1c03252
日期:2021.11.5
Chemodivergent reactions of oximes and diazo esters involving Rh-catalyzed [3+2] annulation and photodriven O–H insertion have been developed to generate oxazoles and oxime ethers. A range of aldehyde and ketone oximes reacted with α-diazocarbonyl compounds in a controllable manner in which functional groups, including ketone, ester, amide, ether, thiol ether, silane, alkene, allene, and alkyne groups
formal [4 + 2] cycloaddition of oximes with o-hydroxybenzyl alcohols was developed to easily synthesize diverse 1,3-benzoxazine derivatives. This synthesis was achieved under visible light-based organocatalytic and TsOH conditions. The reaction proceeds through the photoisomerization of oximes via visible light-mediated energy transfer, followed by the nucleophilic attack of o-QMs to oximes as a 1,2-dipole