描述了一种通过金(I)催化的1-芳基-2-炔丙基环己二-2-烯醇的环异构化反应轻松合成四氢苯并[ b ]呋喃的方法。建议该转化过程通过金(I)催化的叔烯丙醇重排进行,得到仲烯丙基醇,该仲烯丙醇经过羟基5-exo-dig加成到金(I)活化的炔烃上以生成乙烯基金种类。所得到的乙烯基金中间体的原型脱脂,然后进行芳构化,得到四氢苯并[ b ]呋喃。
Synthesis of tetrahydrobenzo[
<i>b</i>
]furans via a gold(I)‐catalyzed rearrangement/cycloisomerization sequence of cyclic 1‐aryl‐2‐propargyl‐cyclohex‐2enols
作者:Hsiao‐Feng Chen、Ming‐Chang P. Yeh
DOI:10.1002/jccs.201800320
日期:2019.6
A facile synthesis of tetrahydrobenzo[b]furans via gold(I)‐catalyzed cycloisomerization of 1‐aryl‐2‐propargylcyclohex‐2‐enols is described. The transformation is suggested to proceed through a gold(I)‐catalyzed tertiary allylic alcohol rearrangement to give a secondary allylic alcohol that underwent a 5‐exo‐dig addition of the hydroxyl group onto the gold(I)‐activated alkyne to give a vinylgold species
描述了一种通过金(I)催化的1-芳基-2-炔丙基环己二-2-烯醇的环异构化反应轻松合成四氢苯并[ b ]呋喃的方法。建议该转化过程通过金(I)催化的叔烯丙醇重排进行,得到仲烯丙基醇,该仲烯丙醇经过羟基5-exo-dig加成到金(I)活化的炔烃上以生成乙烯基金种类。所得到的乙烯基金中间体的原型脱脂,然后进行芳构化,得到四氢苯并[ b ]呋喃。
Reductive cyclization of α-cyclopropylketones with alkynyl- and aryl-tethered substituents
Photoinduced electron transfer (PET) reactions of α-cyclopropyl-substituted ketones and triethylamine (TEA) were used to initiate the cyclopropylcarbinyl-homoallyl rearrangement. The intramolecular cyclization reaction onto triple bonds was performed yielding bicyclic and spirocyclic compounds. Furthermore, in some preliminary studies it was shown that even intramolecular aromatic substitutions are