Efficient Radical Coupling of Organobromides Using Dimanganese Decacarbonyl
作者:Bruce C. Gilbert、Chris I. Lindsay、P. Terry McGrail、Andrew F. Parsons、David T. E. Whittaker
DOI:10.1080/00397919908086433
日期:1999.8.1
Abstract Wurtz-type radical coupling of a variety of allylic and benzylic bromides was observed on irradiation with dimanganesedecacarbonyl in excellent yield (77-99%). Efficient cross-coupling of two different bromides was also readily achieved.
Auxiliary silicon in regioselective cobalt catalyzed protoberberine syntheses
作者:Russell L. Hillard、Carol A. Parnell、K.Peter C. Vollhardt
DOI:10.1016/s0040-4020(01)88589-6
日期:1983.1
η5-Cyclopentadienyl dicarbonyl cobalt catalyzes the cocyclization of 1,2-bis(propargyl)-1,2,3,4-tetrahydroisoquinolines 4b and 5 with alkynes to provide a novel synthetic entry into the tetrahydroprotoberberine nucleus. By judicious choice of trimethylsilyl substituents, regiocontrol in the D-ring can be achieved. Reaction of 4b with benzonitrile in the presence of the catalyst furnishes the rare isoquino[2
η 5 -环戊二烯基二羰基钴催化的1,2-双(炔丙基)-1,2,3,4-四氢异喹啉的cocyclization 4B和5与炔烃是提供一种新颖的合成进入tetrahydroprotoberberine细胞核。通过明智地选择三甲基甲硅烷基取代基,可以实现D环中的区域控制。的反应4B与在催化剂的存在下苄腈配料的稀土异奎诺[2,1- b ] -2,6-萘啶骨架,也区域选择性。
Cobalt-mediated cycloisomerization of δ-substituted ε-acetylenic β-ketoesters construction of angular triquinane by a sequence ene/Pauson-Khand reactions
作者:Jean-Luc Renaud、Corinne Aubert、Max Malacria
DOI:10.1016/s0040-4020(99)00172-6
日期:1999.4
The preparation of δ-substituted ε-acetylenic β-ketoesters is fully described. Their cobalt-mediated Conia-ene reactions led to variously functionalized methylenecyclopentanes in high yields and with a moderate control of the 1,4 diastereoselectivity. A sequence involving the cobalt-mediated ene and Pauson-Khand reactions is presented and allowed the construction of the angular triquinane framework
Tetracopper σ‐Bound <i>μ</i>‐Acetylide and ‐Diyne Units Stabilized by a Naphthyridine‐based Dinucleating Ligand
作者:Pablo Ríos、Matthew S. See、Rex C. Handford、Jason K. Cooper、T. Don Tilley
DOI:10.1002/anie.202310307
日期:2023.11.6
Reaction of two equivalents of a dicopper(I) tert-butoxide species with an appropriate acetylide synthon allowed the rational synthesis of a molecular tetracopper(I) acetylide, which possesses an unusual μ4-η1:η1:η1:η1 coordination mode. This geometry opens the door to higher nuclearity homo- or heterometallic architectures, as demonstrated by the formation of a pentacopper(I) complex.
两当量的二铜(I)叔丁醇物质与适当的乙炔化物合成子的反应允许合理合成分子四铜(I)乙炔化物,其具有不寻常的μ 4 - η 1 : η 1 : η 1 : η 1协调模式。这种几何形状为更高核同质或异质金属结构打开了大门,正如五铜(I)络合物的形成所证明的那样。
Hashmi, A. Stephen K.; Szeimies, Guenter, Chemische Berichte, 1994, vol. 127, # 6, p. 1075 - 1090