Palladium-catalyzed reduction of alkynes employing HSiEt3: stereoselective synthesis of trans- and cis-alkenes
摘要:
The palladium-catalyzed semi-hydrogenation of alkynes to trans- or cis-alkenes employing HSiEt3 as the reductant is developed The CuSO4 played a significant role for (he trans/cis stereoselectivity The labeling study revealed that the two olefinic hydrogen atoms came from HSiEt3 and H2O, respectively (C)) 2009 Elsevier Ltd All rights reserved
Stereospecific Desulfinylation of α,β-Epoxy Sulfoxides with Butyllithium. A New Synthesis of Epoxides and Allylic Alcohols from Carbonyl Compounds
作者:Tsuyoshi Satoh、Youhei Kaneko、Koji Yamakawa
DOI:10.1246/bcsj.59.2463
日期:1986.8
easily prepared from carbonylcompounds and 1-chloroalkyl phenyl sulfoxide, with 1 equivalent of butyllithium at low temperature gave epoxides in good yields. The similar α,β-epoxy sulfoxides having an arylmethyl group at the α-position gave 3-aryl-allylic alcohols upon treatment with excess butyllithium at −70 °C. These reactions offer a simple and useful approach to the synthesis of epoxides and 3-aryl-allylic
A novel synthesis of epoxides and allylic alcohols from carbonyl compounds through α, β-epoxy sulfoxides
作者:Tsuyoshi Satoh、Youhei Kaneko、Koji Yamakawa
DOI:10.1016/s0040-4039(00)84534-7
日期:——
Treatment of α,β-epoxy sulfoxides, easily prepared from carbonyl compounds with 1 equivalent of n-butyllithium at −100 °C gave the desulfinated epoxides in good yields. The similar α,β-epoxy sulfoxides having arylmethyl group at α-position, on treatment with excess n-butyllithium at −70 °C afforded 3-aryl allylicalcohols.
Transition-Metal Catalyzed Stereoselective γ-Arylation and Friedel-Crafts Alkylation: A Concise Synthesis of Indenes
作者:Karu Ramesh、Gedu Satyanarayana
DOI:10.1002/ejoc.202000030
日期:2020.6.16
A concisesynthesis of Mizoroki–Heck products and corresponding indenes starting with simple tert ‐alkenols and aryl halides is presented. Notably, the γ‐arylation was done under [Pd]‐catalysis by using water as the sole green solvent and the synthesis of indenes via acid‐mediated intramolecular Friedel–Crafts cyclization.