LIC-KOR promoted formation of conjugated dienes as useful building blocks for palladium-catalyzed syntheses
作者:Annamaria Deagostino、Manuele Migliardi、Ernesto G. Occhiato、Cristina Prandi、Chiara Zavattaro、Paolo Venturello
DOI:10.1016/j.tet.2005.01.044
日期:2005.3
It is demonstrated that α,β-unsaturated acetals can be considered a synthetic tool for transforming carbonyl derivatives into cheap and easily accessible starting materials for the construction of various and more complex structures. The lithium–potassium mixed superbase LIC-KOR induces a conjugate elimination reaction that converts α,β-unsaturated acetals into 1E-1-alkoxybuta-1,3-dienes. These derivatives
已经证明,α,β-不饱和缩醛可以被认为是用于将羰基衍生物转化成廉价且易于获得的起始材料以用于构建各种和更复杂的结构的合成工具。锂-钾混合超碱LIC-KOR引起共轭消除反应,该反应将α,β-不饱和缩醛转化为1 E -1-烷氧基丁1,3-二烯。这些衍生物可以很容易地就地金属化并通过与亲电试剂反应而官能化。结果可分为两部分:(1)烷氧基二烯基硼酸酯与四氢萘醌或异苯并二氢吡喃酮衍生的乙烯基三氟甲磺酸酯之间的钯催化交叉偶联反应;(2)在钯催化剂的存在下与芳基衍生物的区域和立体选择性交叉偶联反应(Heck条件)。
Palladium-Catalyzed Decarboxylative<i>sp</i>-<i>sp</i><sup>2</sup>Cross-Coupling Reactions of Aryl and Vinyl Halides and Triflates with α,β-Ynoic Acids using Silver Oxide
作者:Hyunseok Kim、Phil Ho Lee
DOI:10.1002/adsc.200900502
日期:2009.11
Palladium-catalyzed decarboxylative sp-sp2 cross-couplingreactions of aryl and vinyl halides and triflates with α,β-ynoic acids using silver oxide have been developed. A variety of α,β-ynoic acids were readily decarboxylated in the presence of silver oxide and then, generated in situ, silver acetylides were coupled with electrophiles in the presence of a palladium(0) catalyst under neutral conditions
Fused bicyclic carboxamide derivatives and methods of their use
申请人:Dolle E. Roland
公开号:US20050054630A1
公开(公告)日:2005-03-10
Fused bicyclic carboxamide derivatives are disclosed. Pharmaceutical compositions containing the compounds and methods for their use are also disclosed.
Palladium-Catalyzed Allyl Cross-Coupling Reactions with In Situ Generated Organoindium Reagents
作者:Kooyeon Lee、Hyunseok Kim、Juntae Mo、Phil Ho Lee
DOI:10.1002/asia.201000890
日期:2011.8.1
compounds may be effective nucleophilic coupling partners in palladium‐catalyzed cross‐coupling reactions. A variety of allyl halides, such as allyl iodide, allyl bromide, crotyl bromide, prenyl bromide, geranyl bromide, and 3‐bromocyclohexene afforded the allylic cross‐coupling products in good to excellent yields. Stereochemistry of the double bond is retained in the allylic cross‐coupling reactions
Cascade reactions are an important strategy in reaction design, allowing streamlining of chemical synthesis. Here we report a cascade Suzuki–Miyaura/Diels–Alder reaction, employing vinyl Bpin as a bifunctional reagent in two distinct roles: as an organoboron nucleophile for cross-coupling and as a Diels–Alder dienophile. Merging these two reactionsenables a rapid and operationally simple synthesis