Exploring the versatility of the Johnson–Claisen rearrangement: access to functionally versatile δ-ethoxycarbonyl-α,β-unsaturated nitriles
作者:Kelly L. Cosgrove、Ross P. McGeary
DOI:10.1016/j.tet.2010.02.045
日期:2010.4
aldehydes were converted to cyanohydrins, by employing either KCN in aqueous acid, or by using TMSCN with catalytic K2CO3, followed by acid hydrolysis of the TMS ether. These cyanohydrins underwent a Claisenrearrangement employing a modified Johnson–Claisen protocol to yield unsaturated nitriles in good yields and with moderate E/Z selectivity.
描述了实际进入δ-乙氧基羰基-α,β-不饱和腈的方法。通过在酸性水溶液中使用KCN或通过将TMSCN与催化性K 2 CO 3一起使用,然后将TMS醚酸水解,可以将α,β-不饱和醛转化为氰醇。这些氰醇经过改良的Johnson-Claisen方案进行了Claisen重排,以高收率和适度的E / Z选择性产生不饱和腈。
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作者:Krepski, Larry R.、Jensen, Karen M.、Heilmann, Steven M.、Rasmussen, Jerald K.、Lynch, Laurie E.
作者:Huenig, Siegfried、Marschner, Claus、Peters, Karl、Schnering, Hans Georg von
DOI:——
日期:——
Diastereoselective ene reaction in the photooxygenation of the silyl cyanohydrins of .alpha.,.beta.-unsaturated aldehydes: necessity for a common symmetrical intermediate of the perepoxide type
作者:Waldemar Adam、Luiz H. Catalani、Axel Griesbeck
DOI:10.1021/jo00376a105
日期:1986.12
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作者:Colombo, Lino、Gennari, Cesare、Santandrea, Marco、Narisano, Enrica、Scolastico, Carlo