A direct and straightforward thiocyanation of enamides with NH4SCN under metal-free conditions has been accomplished. A variety of (E)-β-thiocyanoenamides are readily produced in a regio- and stereo-selective manner. The protocol features mild reaction conditions, good functional group tolerance and operational simplicity. The potential utility of this strategy was further demonstrated by transformation
Manganese(<scp>iii</scp>)-promoted highly stereoselective phosphorylation of acyclic tertiary enamides to synthesize <i>E</i>-selective β-phosphoryl enamides
作者:Xin-Ming Xu、Wenzhong Li、Qiwei Li、Sen Chen、Xuesi Zhang、Bin Yang、Wei-Li Wang
DOI:10.1039/d2ob00980c
日期:——
A concise manganese(iii)-promoted stereoselective β-phosphorylation of tertiary enamides and diverse H-phosphine oxides was achieved, which proceeds with absolute E-selectivity in high efficiency and is the first case of E-selective β-phosphorylation of tertiary enamides.
TMSCN-enabled tandem reaction involving enamides and elementalselenium to access a diverse array of benzoselenophenes. Notably, this methodology involves the direct 2-fold C(sp2)–H bond activation without the need for preinstalled halides or boronic acids as reaction handles. The protocol offers several noteworthy features, including the absence of transition metals and strong oxidants, high reaction efficiency
Photocatalytic chemo-, regio- & stereoselective olefinic β-C–H decarboxylative alkylation of enamides with diacyl peroxides
作者:Han Liu、Yechun Wu、Lingli Liu、Jin-Tao Yu、Changduo Pan
DOI:10.1039/d3cc01908j
日期:——
A decarboxylative alkylation of enamides with alkyl diacyl peroxides induced by visible-light is described. The chemo-, regio- and stereoselective olefinic β-C–H alkylation generates a series of primary- and secondary alkylated enamides in yields up to 95%. This transformation bears the advantages of operational simplicity, good functional group compatibility and mild conditions.