NaH mediated isomerisation–allylation reaction of 1,3-substituted propenols
作者:Adam J. S. Johnston、Mark G. McLaughlin、Jolene P. Reid、Matthew J. Cook
DOI:10.1039/c3ob41857j
日期:——
A base mediated isomerisationâallylation protocol of 1,3-disubstituted propenols has been established. The use of diaryl and aryl-silyl substrates is reported alongside the use of substituted allyl bromides. Mechanistic experiments have also been conducted to elucidate the reaction pathway.
of primary and secondary E-allylic amines by reduction of 1-azadiene intermediates is described. β-Enamino phosphonium salts are suitable starting materials to prepare secondary allylic amines. Two methods are reported for the obtention of primary allylic amines from 4-amino-1-aza-1,3-dienes. Method A leads to the desired compounds by straight reduction with AlH3 or DIBALH; method B is a stepwise procedure
TEMPO-mediated allylic C–H amination with hydrazones
作者:Xu Zhu、Shunsuke Chiba
DOI:10.1039/c4ob00839a
日期:——
TEMPO-mediated reactions of alkenyl hydrazones afforded azaheterocycles via sp3 C–H allylic amination. The transformation is featured by a sequence of remote allylic H-radical shift and allylic homolytic substitution with hydrazone radicals.
Base-Mediated Cascade Rearrangements of Aryl-Substituted Diallyl Ethers
作者:Jolene P. Reid、Catherine A. McAdam、Adam J. S. Johnston、Matthew N. Grayson、Jonathan M. Goodman、Matthew J. Cook
DOI:10.1021/jo502403n
日期:2015.2.6
Two base-mediated cascade rearrangement reactions of diallyl ethers were developed leading to selective [2,3]-Wittig–oxy-Cope and isomerization–Claisen rearrangements. Both diaryl and arylsilyl-substituted 1,3-substituted propenyl substrates were examined, and each exhibits unique reactivity and different reaction pathways. Detailed mechanistic and computational analysis was conducted, which demonstrated