作者:Siu Min Tan、Anthony C. Willis、Michael N. Paddon‐Row、Michael S. Sherburn
DOI:10.1002/anie.201510925
日期:2016.2.24
combining the powerful twofold diene‐transmissive Diels–Alder chemistry of [3]dendralenes with the simplicity of enamine formation. On mixing at ambient temperature, a simple dienal condenses with a primary or secondary amine to generate the enamine, a 1‐amino‐[3]dendralene in situ, and this participates as a double diene in a sequence of two Diels–Alder events with separate dienophiles. Overall, four
Gold(i)-catalyzed Claisen rearrangement of allenyl vinyl ethers; synthesis of substituted 1,3-dienes
作者:Marie E. Krafft、Kassem M. Hallal、Dinesh V. Vidhani、John W. Cran
DOI:10.1039/c1ob06297b
日期:——
Synthesis of substituted 1,3-dienes was achieved viagold(I)-catalyzed Claisen rearrangement of allenyl vinylethers. The N-heterocyclic carbenegold chloride catalyst (IPrAuCl) was superior in terms of activity and selectivity and afforded the 3,3-product in excellent yields. A proposed cation-π inter-action played a significant role in affecting the reaction rate.