Sonochemical cleavage of 2-(bromomethyl)aziridines by a zinc–copper couple
摘要:
1-Alkyl- and 1-arylmethyl-2-(bromomethyl)aziridines are readily cleaved by the sonochemical zinc-copper couple in aqueous methanol at room temp. to afford allylamines.
Nickel(II) Catalyzed Hydroboration: A Route to Selective Reduction of Aldehydes and
<i>N</i>
‐Allylimines
作者:Istiak Hossain、Joseph A. R. Schmidt
DOI:10.1002/ejic.202000092
日期:2020.5.22
[(iminophosphine)nickel(allyl)]+ complex was found to be sufficiently electrophilic to activate aldehydes and N‐allylimines to undergo hydroboration with pinacolborane (HBpin) under mild reaction conditions. The catalyst displayed excellent selectivity toward aldehydes in the presence of ketones. A wide variety of functional groups were tolerated, including halogens, NO2, CN, OMe, and alkenes for both aldehydes
Synthesis of Cyclic
<i>N</i>
‐Hydroxylated Ureas and Oxazolidinone Oximes Enabled by Chemoselective Iodine(III)‐Mediated Radical or Cationic Cyclizations of Unsaturated
<i>N</i>
‐Alkoxyureas
作者:Laure Peilleron、Pascal Retailleau、Kevin Cariou
DOI:10.1002/adsc.201901135
日期:2019.11.19
In this study we describe the reactivity of unsaturated N‐alkoxyureas in the presence of different combinations of a hypervalent iodine(III) reagent and a bromide source or TEMPO. Three complementary cyclizations can be achieved depending on the reaction conditions. On the one hand, PIFA with pyridinium bromide leads to an oxybromination reaction. On the other hand, bis(tert‐butylcarbonyloxy)iodobenzene
The reaction of enantiomerically enriched 2-methyl-2-nitro-3-(diphenylphosphatoxy)alkyl radicals with tributyltin hydride and AIBN in benzene at reflux results in the formation of alkene radical cation/anion pairs, which are trapped intramolecularly by amine nucleophiles, leading to pyrrolidine and piperidine systems with memory of stereochemistry. The scope and limitations of the system are explored
The application relates to 2-amino-4-(substituted amino)phenyl carbamate derivatives, or pharmaceutically acceptable salts or solvates thereof, as KCNQ2/3 potassium channel modulators, and methods of their uses.
Synthesis of Thioalkyne-Substituted Thiazolidine-2-thiones Using Tris(trimethylsilyl)methyllithium and Carbon Disulfide
作者:Kazem Safa、Maryam Alyari
DOI:10.1055/s-0034-1379253
日期:——
simple one-pot approach to the synthesis of 5-(iodomethyl)thiazolidine-2-thiones via multicomponent reaction of allylamines, carbon disulfide, and iodine under solvent-free conditions is presented. The obtained 5-(iodomethyl)thiazolidine-2-thiones were converted into silyl-protected terminal [(ethynylthio)methyl]-substituted thiazolidine-2-thiones by treatment with lithium 2,2,2-tris(trimethylsilyl)ethanedithioate