An efficient and unprecedented palladium‐catalyzed S‐glycosylation reaction of a range of alkenyl and alkynyl halides by using thiosugars as nucleophile partners has been established. With palladium diacetate in combination with Xantphos as the catalytic system, a variety of β‐alkenylthioglycosides as well as β‐alkynylthioglycosides can be prepared in good to excellent yields. The efficiency of this
作者:Joseph B. Lambert、Eric G. Larson、Richard J. Bosch、Mollie L. E. TeVrucht
DOI:10.1021/ja00305a019
日期:1985.9
La reaction de cyclopropanation entre le dibromomethylene, obtenu a partir du reactif Seyferth (PhHgCBr 3 ), et les alcenes electroniquement deficients est non stereospecifique
La反应 de cyclopropanation entre le dibromomethylene, obtenu a partir du reactif Seyferth (PhHgCBr 3 ), et les alcenes electroniquement deficients est non立体特异性
Reactions of alkylmercurials with heteroatom-centered acceptor radicals
作者:Glen A. Russell、Preecha. Ngoviwatchai、Hasan I. Tashtoush、Anna. Pla-Dalmau、Rajive K. Khanna
DOI:10.1021/ja00219a030
日期:1988.5
En particulier, reactivite relative de chlorures d'alkylmercures vis-a-vis de PhS • , PhSe • et I • generes a partir du disulfure de phenyle, diseleniure de phenyle et du β-iodo styrene ou du (diphenyl-1,1 iodo-2) ethylene
En 特别,反应性相对于 de PhS • , PhSe • et I • 与 de PhS • , PhSe • et I • 属 a partir du disulfure de phenyle, diseleniure de phenyle et du β-iodo 苯乙烯 ou du (diphenyl-1,1 iodo -2) 乙烯
Kinetic evidence for the formation of discrete 1,4-dehydrobenzene intermediates. Trapping by inter- and intramolecular hydrogen atom transfer and observation of high-temperature CIDNP
作者:Thomas P. Lockhart、Paul B. Comita、Robert G. Bergman
DOI:10.1021/ja00404a018
日期:1981.7
LBL-11696 Pre print Submitted to the Journal of the American Chemical Society KINETIC EVIDENCE FOR THE FORMATION OF DISCRETE 1,4-DEHYDROBENZENE INTERMEDIATES. TRAPPING BY INTER- AND INTRAMOLECULAR HYDROGENATOMTRANSFER AND OBSERVATION OF HIGH-TEMPERATURE CIDNP. Thomas P. Lockhart. Paul B. Comita, and Robert C. Bergman September 1980 TWO-WEEK LOAN COPY Thi~ is a Library Circulating Copy wh1ch may b
LBL-11696 预印本已提交至美国化学学会杂志 离散 1,4-脱氢苯中间体形成的动力学证据。通过分子间和分子内氢原子转移的捕获和高温 CIDNP 的观察。托马斯·P·洛克哈特。Paul B. Comita 和 Robert C. Bergman 1980 年 9 月 两周借阅本 这是一本图书馆的流通本,可借阅两周。个人保留副本)> 致电技术人员。信息。Division )> 根据合同 W-7405-ENG-48 为美国能源部准备
The effect of vicinyl olefinic halogens on cross-coupling reactions using Pd(0) catalysis
作者:Michael G. Organ、Haleh Ghasemi、Cory Valente
DOI:10.1016/j.tet.2004.08.006
日期:2004.10
products reliably under all reaction conditions. Compound 5 did not provide cross coupled products under any of the reaction conditions used. The Negishi reaction was the only one that worked for templates 4 and 11. Studies indicate that oxidative addition of the most reactive carbon–halogenbond to Pd(0) is followed by elimination of the second halide, when the second halide is a bromide or an iodide