Benzisothiazol-3-ones through a Metal-Free Intramolecular N-S Bond Formation
作者:Ke Yang、Hao Zhang、Ben Niu、Tiandi Tang、Haibo Ge
DOI:10.1002/ejoc.201801090
日期:2018.11.1
An efficient selectfluor‐promoted synthesis of benzoisothiazol‐3‐ones through a sequential N–S bondformation and C–S bond cleavage process was developed.
<i>ortho-</i>Metalation of Unprotected 3-Bromo and 3-Chlorobenzoic Acids with Hindered Lithium Dialkylamides
作者:Frédéric Gohier、Jacques Mortier
DOI:10.1021/jo026514t
日期:2003.3.1
Upon treatment of 3-chloro/bromobenzoic acids with hindered lithium dialkylamides (LDA or LTMP) at -50 degreesC, lithium 3-chloroibromo-2-lithiobenzoates are generated. These dianions can be trapped as such to afford after electrophilic quenching a variety of simple 2-substituted-3-chlorolbromobenzoic acids. The 3-bromo-2-lithiobenzoate is less stable than the corresponding 3-chloro derivative and partly eliminates lithium bromide, thus setting free lithium 2,3- and 3,4-dehydrobenzoates that can be intercepted in situ with the hindered base.
Moyroud, Joel; Guesnet, Jean-Luc; Bennetau, Bernard, Bulletin de la Societe Chimique de France, 1996, vol. 133, # 2, p. 133 - 141
作者:Moyroud, Joel、Guesnet, Jean-Luc、Bennetau, Bernard、Mortier, Jacques