Hydrosilylation-Promoted Furan Diels–Alder Cycloadditions with Stereoselectivity Controlled by the Silyl Group
作者:Zhi-Yun Liu、Ming Zhang、Xiao-Chen Wang
DOI:10.1021/jacs.9b11909
日期:2020.1.8
unprecedented B(C6F5)3-catalyzed cascade reaction of N-allyl-N-furfurylamides involving an initial intramolecularfuranDiels-Alderreaction and subsequent ether cleavage. The reaction has a broad substrate scope, even tolerating a trialkyl-substituted olefin as the dienophile, which has not previously been observed with conventional furanDiels-Alderreactions. In addition, the relative configuration
Enantioselective Reductive Divinylation of Unactivated Alkenes by Nickel-Catalyzed Cyclization Coupling Reaction
作者:Jin-Bao Qiao、Ya-Qian Zhang、Qi-Wei Yao、Zhen-Zhen Zhao、Xuejing Peng、Xing-Zhong Shu
DOI:10.1021/jacs.1c05670
日期:2021.8.25
benzene-fused compounds. Herein, we report an enantioselective cross-electrophile divinylation reaction of nonaromatic substrates, 2-bromo-1,6-dienes. The approach thus offers a route to new chiral cyclic architectures, which are key structural motifs found in various biologically active compounds. The reaction proceeds under mild conditions, and the use of chiral t-Bu-pmrox and 3,5-difluoro-pyrox ligands
Alkyne Aminopalladation/Heck and Suzuki Cascades: An Approach to Tetrasubstituted Enamines
作者:Finn J. Geffers、Florens R. Kurth、Peter G. Jones、Daniel B. Werz
DOI:10.1002/chem.202103567
日期:2021.10.25
Internal alkynes have been used in combination with tosylamides and the Narasaka leaving group to form tetra(hetero)substituted enamines in an aminopalladationcascade reaction. The cascade was terminated either intramolecularly by a Heck reaction or intermolecularly in a Suzuki-type reaction with a boronic acid.
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.