Mizoroki–Heck Cyclizations of Amide Derivatives for the Introduction of Quaternary Centers
作者:Jose M. Medina、Jesus Moreno、Sophie Racine、Shuaijing Du、Neil K. Garg
DOI:10.1002/anie.201703174
日期:2017.6
report non-decarbonylative Mizoroki–Heck reactions of amide derivatives. The transformation relies on the use of nickel catalysis and proceeds using sterically hindered tri- and tetrasubstituted olefins to give products containing quaternary centers. The resulting polycyclic or spirocyclic products can be obtained in good yields. Moreover, a diastereoselective variant of this method gives access to an
The synthesis and crystal structures of triphenyl(1,2,3-trimethylallyl)tin and triphenyl( 1,1,2-trimethylallyl)tin
作者:Craig M. Van Zyl、Jeffrey L. McKeeby、Paul C. Van Dort、Erlund J. Larson、Michael E. Silver、John C. Huffman
DOI:10.1016/s0020-1693(00)87781-6
日期:1987.10
Abstract In an attempt to isolate new allylating reagents, two new tin compounds, triphenyl(1,2,3-trimethylallyl)tin ( 3 ) and triphenyl(1,1,2-trimethylallyl)tin ( 4 ) have been prepared and their crystalstructures determined. Both compounds are examples of σ-bound allyl complexes. However, the infrared spectra of both compounds do not show the absorptions characteristic of other σ-bound allyl complexes
Rhenium-Catalyzed Intramolecular Carboalkoxylation and Carboamination of Alkynes for the Synthesis of C3-Substituted Benzofurans and Indoles
作者:Ming-Guang Rong、Tian-Zhu Qin、Weiwei Zi
DOI:10.1021/acs.orglett.9b01619
日期:2019.7.19
route to synthesize de novo C3-substituted benzofurans and indoles under mild conditions in moderate to good yields. Mechanisticstudies revealed that the rhenium played the role of a π acid catalyst to activate the alkynes, followed by a charge-accelerated [3,3]-sigmatropicrearrangement.