A convenient one-pot Cu(I)-catalyzed strategy for regioselective synthesis of trisubstituted furan derivatives has been developed via (2-furyl) carbenecomplexes. This process has opened a new synthetic route to a variety of α-carbonyl furans using air as the oxidant affording furans in good yields.
Preparation of 4-(Nitromethyl)furan Derivatives and Their Application in the Syntheses of Bis(furan-2-yl)oximes
作者:Yinbo Wan、Yang Zhu、Haiyun Peng、Guisheng Deng
DOI:10.1021/acs.joc.1c02359
日期:2022.1.7
An efficient method for the preparation of tetrasubstituted furans, which contains a nitromethyl group at the 4-position, has been developed. The applications of 4-(nitromethyl)furans on the synthesis of highly functionalized bis(furyl)oxime were explored for the first time.
Regioselective Synthesis of Multisubstituted Furans via Metalloradical Cyclization of Alkynes with α-Diazocarbonyls: Construction of Functionalized α-Oligofurans
作者:Xin Cui、Xue Xu、Lukasz Wojtas、Martin M. Kim、X. Peter Zhang
DOI:10.1021/ja309446n
日期:2012.12.12
five-membered furan structures. The Co(II) complex of 3,5-Di(t)Bu-IbuPhyrin, [Co(P1)], is effective in catalyzing the metalloradical cyclization reaction under neutral and mild conditions. The [Co(P1)]-catalyzed process tolerates a wide range of α-diazocarbonyls and terminal alkynes with varied steric and electronic properties, producing polyfunctionalized furans with complete regioselectivity. The catalytic
Rearrangement of Propargylic Esters: Metal-Based Stereospecific Synthesis of (<i>E</i>)- and (Z)-Knoevenagel Derivatives
作者:José Barluenga、Lorena Riesgo、Rubén Vicente、Luis A. López、Miguel Tomás
DOI:10.1021/ja072864r
日期:2007.6.1
catalysts perform the isomerization with complementary Z/E selectivity. Moreover, alkynyl-conjugated Knoevenagel products are produced from (bisalkynyl)methyl acetates. In such a case, the reaction is chemoselective as the 1,3-acetyl migration takes place through the alkoxyalkyne group in preference over the phenylalkyne group. The resulting (E)-alkynylenone unit suffers metal-catalyzed cyclization
Silver-Catalyzed Highly Regioselective Synthesis of<font>α</font>-Carbonyl Furans from Enynones
作者:Zheng-Wang Chen、Miao-Ting Luo、Dong-Nai Ye、Zhong-Gao Zhou、Min Ye、Liang-Xian Liu
DOI:10.1080/00397911.2013.878027
日期:2014.6.18
A general and efficient method for the synthesis of a wide range of alpha-carbonyl furans is described here. The cyclization of enynone is catalyzed by AgBF4 in a fluorous biphasic system of perfluorodecalin and N,N-dimethylformamide. A variety of chain ketone and cyclic ketone substrates were used to investigate the scope of the reactions.