Copper catalyzed regioselective coupling of allylic halides and alkynes promoted by weak inorganic bases
作者:Lothar W. Bieber、Margarete F. da Silva
DOI:10.1016/j.tetlet.2007.08.010
日期:2007.10
Allylichalides and terminal alkynes couple under CuI catalysis in DMSO or DMF solution. In most cases, sodium carbonate or bicarbonate is sufficient to promote the reaction; less reactive alkynes require catalytic amounts of DBU. Bifunctional alkynes and halides can be reacted selectively according to the stoichiometry used. Trimethylsilyl, hydroxyl, ester and halide groups are tolerated in the alkyne
Recyclable heterogeneous metal foil-catalyzed cyclopropenation of alkynes and diazoacetates under solvent-free mechanochemical reaction conditions
作者:Longrui Chen、Devonna Leslie、Michael G. Coleman、James Mack
DOI:10.1039/c8sc00443a
日期:——
cyclopropenation of terminal and internal alkynes under mechanochemical reactionconditions. This methodology enables the functionalization of a wide range of terminal or internal alkynes under ambient, aerobic, and solvent-freeconditions. Finally, we have demonstrated a unique and versatile one-pot domino Sonogashira-cyclopropenation mechanochemical reaction for the formation of complex cyclopropenes.
Decarboxylative/Sonogashira-type cross-coupling using PdCl<sub>2</sub>(Cy*Phine)<sub>2</sub>
作者:Yong Yang、Yee Hwee Lim、Edward G. Robins、Charles W. Johannes
DOI:10.1039/c6ra12916a
日期:——
Expedient protocol to access a wide range of internal alkynes and symmetrical di(heteroaryl)alkynesviatandem decarboxylative–Sonogashira cross-coupling.
通过串联脱羧化-Sonogashira交叉偶联方法访问广泛的内部炔烃和对称的双(杂环烷基)炔烃。
One-Pot Synthesis of Decahydropyrene via Tandem C–H Activation/Intramolecular Diels–Alder/1,3-Dipolar Cycloaddition
作者:Hui Lin、Lin Dong
DOI:10.1021/acs.orglett.6b02768
日期:2016.11.4
A novel decahydropyrene synthesis has been successfully developed involving a tandem rhodium-catalyzed C–H activation/intramolecular Diels–Alder reaction/1,3-dipolar cycloaddition cascade process by using diazole as a tracelessdirectinggroup. The advantage of this one-pot strategy is a quite simple, efficient, highly stereoselective, and unique product structure.
作者:James Y. Hamilton、David Sarlah、Erick M. Carreira
DOI:10.1002/anie.201302731
日期:2013.7.15
No leaving group needed: With an Ir(P,olefin) complex as catalyst, the direct enantioselective allylic alkynylation of secondary allylic alcohols with potassium alkynyltrifluoroborates as alkynylating reagents has been achieved. High levels of enantioselectivity and high yields were achieved with this operationally easy and robust protocol, the use of which was demonstrated in the synthesis of GPR40 receptor agonist AMG 837. cod = 1,5-cyclooctadiene.