Primary Alcohols via Nickel Pentacarboxycyclopentadienyl Diamide Catalyzed Hydrosilylation of Terminal Epoxides
作者:Keri A. Steiniger、Tristan H. Lambert
DOI:10.1021/acs.orglett.1c03029
日期:2021.10.15
efficient and regioselective hydrosilylation of epoxides co-catalyzed by a pentacarboxycyclopentadienyl (PCCP) diamide nickel complex and Lewis acid is reported. This method allows for the reductive opening of terminal, monosubstituted epoxides to form unbranched, primaryalcohols. A range of substrates including both terminal and nonterminal epoxides are shown to work, and a mechanistic rationale
The epoxidation of chalcone using hydrogenperoxide in the presence of a base in a two-phase medium system following the so-called Inverse Phase Transfer Catalysis (IPTC) process was investigated. Careful examination of various parameters including surfactant concentration, pH, H2O2 decomposition side-reactions and epoxide ring-opening, allowed us to determine optimal experimental conditions
在所谓的反相转移催化(IPTC)法之后,在两相介质系统中在碱的存在下使用过氧化氢对查尔酮进行环氧化。仔细检查各种参数,包括表面活性剂浓度,pH,H 2 O 2分解副反应和环氧化物开环,使我们能够确定最佳实验条件
Synthese und reaktives Verhalten von 3-Aminochinolin
作者:Beate Schönen、Felix Zymalkowski
DOI:10.1002/ardp.19813140515
日期:——
Ammoniak. Die Substitution von 3 gelingt durch Einwirkung von Alkylhalogeniden auf sein Natriumsalz oder durch reduktive Alkylierung mit aromatischen und aliphatischen Ketonen. Acetophenon‐Mannichbasen werden durch 3 umaminiert. Mit Methyl‐vinyl‐keton und Acrylnitril bildet 3 keine Additionsprodukte. Addition an Phenylglycidsäurederivate führt zur Bildung entsprechender Derivate des β‐Phenyl‐isoserins
New synthetic routes to β-fluoro β-phenyllactic acid derivatives and β-fluorocyanohydrins
作者:A.I. Ayi、M. Remli、R. Condom、R. Guedj
DOI:10.1016/s0022-1139(00)82265-4
日期:1981.6
Alkyl phenyl 2,3-epoxycarboxylates from the well-known Darzens glycidic esters synthesis react under very mild conditions with pyridinium-poly-hydrogen fluoride to give corresponding 3-fluoro 3-phenyllactates in almost quantitative yields with a high regio and stereoselectivity.
Mechanism of the Reaction of Nitriles with Alkaline Hydrogen Peroxide. Reactivity of Peroxycarboximidic Acid and Application to Superoxide Ion Reaction
作者:Yasuhiko Sawaki、Yoshiro Ogata
DOI:10.1246/bcsj.54.793
日期:1981.3
peroxycarboximidic acid (1) is not rate-determining in the reaction of nitrile with alkalinehydrogenperoxide to form amide and oxygen; the yield of amide based on H2O2 varies from 20 to 60%. When dimethyl sulfoxide (DMSO), a reactive substrate, is added, the rate is independent of [DMSO] and governed in turn by a rate-determining addition of HOO− to nitrile. This reaction gives a reliable α-value of kHOO−/kHO−, which