Copper-Catalyzed C-P Coupling through Decarboxylation
作者:Jie Hu、Ning Zhao、Bin Yang、Ge Wang、Li-Na Guo、Yong-Min Liang、Shang-Dong Yang
DOI:10.1002/chem.201003561
日期:2011.5.9
developed by copper‐catalyzed decarboxylative coupling of alkenyl, alkynyl carboxylic acids, and N‐benzylproline, respectively, with R2P(O)H (see scheme). All classes of products are important precursors for preparation of biologically active molecules and various phosphorus ligands. This finding represents the first example of copper‐catalyzed decarboxylative coupling to construct CP bonds.
Palladium-catalyzed dehydrogenative coupling of terminal alkynes with secondary phosphine oxides
作者:Jia Yang、Tieqiao Chen、Yongbo Zhou、Shuangfeng Yin、Li-Biao Han
DOI:10.1039/c4cc09567g
日期:——
The dehydrogenative coupling of terminal alkynes with secondary phosphine oxides is developed. In the presence of a silver additive, palladium acetate could efficiently catalyze the dehydrocoupling of secondary phosphine oxides with a variety of terminal alkynes to produce the corresponding alkynylphosphine oxides in high yields. A reaction mechanism is proposed.
Silver-Free Direct Synthesis of Alkynylphosphine Oxides via <i>sp</i>C–H/P(O)–H Dehydrogenative Coupling Catalyzed by Palladium
作者:Jian-Qiu Zhang、Tieqiao Chen、Ji-Shu Zhang、Li-Biao Han
DOI:10.1021/acs.orglett.7b02389
日期:2017.9.1
silver-free palladium-catalyzed dehydrogenative phosphorylation of terminal alkynes with hydrogen phosphine oxides has been developed. Both aromatic and aliphatic terminal alkynes including those bearingfunctionalgroups coupled readily with hydrogen phosphine oxides, producing the corresponding value-added alkynylphosphine oxides in good to excellent yields. This reaction could be easily conducted
the application! An enantioselective synthesis of axially chiral 1‐arylisoquinolines has been achieved, which involves a rhodium‐catalyzed [2+2+2] cycloaddition of diphenylphosphinoyl‐substituted 1‐arylisoquinolines (see scheme). The new diphenylphosphinoyl‐substituted axially chiral 1‐arylisoquinolines were successfully derivatized to the corresponding axially chiral P,Nligand and Lewis base catalyst
The Diels–Alder cycloaddition reaction of tetracyclone and functionalized, internal aryl acetylenes gave access to a number of bulky atropisomeric biaryls in good to excellent yield. The synthesis is convenient and yields the pure biaryls without tedious work-up and purification procedures. Exemplarily the atropisomers have been resolved via the diastereomers in an easy and efficient manner to yield