作者:Martyn R. Ashcroft、Peter Bougeard、Adrian Bury、Christopher J. Cooksey、Michael D. Johnson
DOI:10.1016/0022-328x(85)87417-9
日期:1985.7
homolysis of the substrate, abstracts iodine from the toluenesulphonyl iodide to give the toluenesulphonyl radical, which attacks the organic ligand of the cobaloxime, preferably at the terminal olefinic carbon, thereby displacing cobaloxime(II) and giving the observed organic product.
Coupling of Reformatsky Reagents with Aryl Chlorides Enabled by Ylide‐Functionalized Phosphine Ligands
作者:Zhiyong Hu、Xiao‐Jing Wei、Jens Handelmann、Ann‐Katrin Seitz、Ilja Rodstein、Viktoria H. Gessner、Lukas J. Gooßen
DOI:10.1002/anie.202016048
日期:2021.3.15
organozinc reagents with aryl electrophiles using a cyclohexyl‐YPhos ligand bearing an ortho‐tolyl‐substituent in the backbone. This highly electron‐rich, bulky ligand enables the use of arylchlorides in room temperature couplings of Reformatsky reagents. The reaction scope covers diversely functionalized arylacetic and arylpropionic acid derivatives. Aryl bromides and chlorides can be converted selectively
trans-phenyl-5 diazo-5 pentenes, trans-diphenyl-1,4 diazo-4 butene-1 et cis-methyl-3 aryl-6 diazo-6 hexenes-3 montrent que les reactions de cycloaddition-1,1 et retrocycloaddition-1,1 sont stereoselectives avec retention de configuration totale. Analyse cinetique des reactions des aryl-5 diazo-5 methyl-2 pentenes-2
钝化立体化学结果 a partir des cis-et trans-phenyl-5 diazo-5 pentenes, trans-diphenyl-1,4 dizo-4 butene-1 et cis-methyl-3 aryl-6 diazo-6 hexenes-3 montrent que les 反应 de cycloaddition-1,1 和retrocycloaddition-1,1 sont 立体选择性 avec 保留 de configuration total。分析 芳基-5 重氮-5 甲基-2 戊烯-2 反应电影
Intramolecular Cyclization of 2,7- or 2,8-Bis-unsaturated Esters Mediated by (η<sup>2</sup>-Propene)Ti(O-<i>i</i>-Pr)<sub>2</sub>. Facile Construction of Mono- and Bicyclic Skeletons with Stereoselective Introduction of a Side Chain. A Synthesis of <i>d</i>-Sabinene
作者:Hirokazu Urabe、Ken Suzuki、Fumie Sato
DOI:10.1021/ja9716160
日期:1997.10.1
tert-Butyl 2-en-7-ynoate 6 was treated with (η2-propene)Ti(O-i-Pr)2 (3), generated in situ from Ti(O-i-Pr)4 or Ti(O-i-Pr)3Cl and i-PrMgCl, in ether at −50 to −20 °C to afford the product 8 in good yield. The presence of the intermediate titanabicycle 7 was verified by bis-deuterolysis with excess D2O. When the titanabicycle 7 was treated with 1.1 equiv of i-PrOD and then worked up as usual, the monodeuterated
New Application of Bromotrimethylsilane: Elaboration of Aldehydes/Ketones into Homologous <i>α</i>,<i>β</i>‐Unsaturated Esters via <i>β</i>‐Hydroxy Esters
作者:Suresh C. Suri、Jacob C. Marcischak
DOI:10.1081/scc-200048941
日期:2005.1.1
Abstract α,β‐Unsaturated esters are formed when β‐hydroxy esters react with bromotrimethylsilane which is generated from chlorotrimethylsilane‐lithium bromide in acetonitrile. #Dedicated to Professor Goverdhan Mehta on his 60th birthday.