cyclohexenic ring core, again in a diastereoselective manner. All cycloadducts were formed by a regioselective reaction of the inner allene double bond and, therefore, feature an exocyclic diene motif. A Diels–Alder reaction on N‐tosyl linked cycloadducts 8 and 10 allowed pentacyclic scaffolds to be diastereoselectively constructed. The reactivity of the allenes on [2+2+2] cycloaddition reactions was studied for
Grigg, Ronald; Scott, Ronald; Stevenson, Paul, Journal of the Chemical Society. Perkin transactions I, 1988, p. 1365 - 1370
作者:Grigg, Ronald、Scott, Ronald、Stevenson, Paul
DOI:——
日期:——
Increasing the Efficiency of the Transannular Diels–Alder Strategy via Palladium(II)-Catalyzed Macrocyclizations
作者:Robert G. Iafe、Jonathan L. Kuo、Dustin G. Hochstatter、Tomomi Saga、Jonathan W. Turner、Craig A. Merlic
DOI:10.1021/ol303394t
日期:2013.2.1
Palladium(II)-catalyzed macrocyclizations of bis(vinylboronate ester) compounds are demonstrated to provide a strategically efficient approach to transannular Diels–Alder reaction substrates. In several systems reported, the macrocycle is preorganized such that cycloaddition at room temperature occurs concomitantly with cyclization. Numerous advantages over palladium(0)-catalyzed cross-coupling approaches