The application of cyclic and acyclic enol ethers as electrophiles in cross coupling reactions offers new possibilities for the preparation of functional compounds.
环状和非环状烯醇醚作为亲电试剂在交叉偶联反应中的应用为功能化合物的制备提供了新的可能性。
Electrophilic Difluoro(phenylthio)methylation: Generation, Stability, and Reactivity of α-Fluorocarbocations
作者:Nolan M. Betterley、Panida Surawatanawong、Samran Prabpai、Palangpon Kongsaeree、Chutima Kuhakarn、Manat Pohmakotr、Vichai Reutrakul
DOI:10.1021/ol402631t
日期:2013.11.15
Electrophilic difluoro(phenylthio)methylation of allylsilanes has been achieved using bromodifluoro(phenylthio)methane (PhSCF2Br) and silver hexafluoroantimonate (AgSbF6). The structural assignment and observation of alpha-fluorocarbocation were substantiated by NMR and theoretical calculations. Detailed mechanistic and electronic studies have provided a fundamental understanding of the reactivity and stability of the difluoro(phenylthio)methylium cation (PhSCF2+).
Nickel-Catalyzed Olefination of Unactivated Aliphatic Dithioacetals
作者:Li-Fu Huang、Chih-Hao Huang、Baldur Stulgies、Armin de Meijere、Tien-Yau Luh
DOI:10.1021/ol035802o
日期:2003.11.1
Olefination of aliphatic dithioacetals with Grignard reagents is catalyzed by Ni(acac)(2) in the presence of an appropriate trialkylphosphine ligand.
Asymmetric, <i>anti</i>-Selective Scandium-Catalyzed Sakurai Additions to Glyoxyamide. Applications to the Syntheses of <i>N</i>-Boc <scp>d</scp>-Alloisoleucine and <scp>d</scp>-Isoleucine
作者:David A. Evans、Yimon Aye、Jimmy Wu
DOI:10.1021/ol0604771
日期:2006.5.1
An enantio- and diastereoselective Sakurai-Hosomi reaction, catalyzed by chiral scandium pyridyl-bis(oxazoline) (pybox) complexes, has been developed. Both alkyl- and aryl-substituted allylsilanes are effective coupling partners with N-phenylglyoxamide. Applications of this reaction to the asymmetric syntheses of N-BOC D-alloisoleucine and D-isoleucine are described.
Stereospecific Iron-Catalyzed Carbon(sp<sup>2</sup>)–Carbon(sp<sup>3</sup>) Cross-Coupling with Alkyllithium and Alkenyl Iodides
作者:Xiao-Lin Lu、Mark Shannon、Xiao-Shui Peng、Henry N. C. Wong
DOI:10.1021/acs.orglett.9b00394
日期:2019.4.19
An efficient synthetic protocol involving iron-catalyzed cross-coupling reactions between organolithium compounds and alkenyl iodides as key coupling partners was achieved. More than 30 examples were obtained with moderate to good yields and high stereospecificity. Gram-scale and synthetic applications of this procedure are recorded herein to demonstrate its feasibility and potential utilization.