Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Laurent De Buyck"'
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 84:417-433
Treatment of N-1-(2, 2-dichloroalkylidene)t.butylamines 1a-c with excess methanolic sodium methoxide under reflux afforded mainly a mixture of α-methoxy-α,β-unsaturated aldimines 2a-c and the rearrangement products 3, besides small amounts of N-t.
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 96:242-246
1,2,2-Trisubstituted aziridines have been prepared by reduction of secondary N-1-(2-chloroalkylidene)amines with lithium aluminium hydride. N-Substituted 1-azaspiro[2.5]octanes (spiroaziridines) have been synthesized by this method. Under appropriate
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 91:797-802
2, 3, 5, 6-Tetrachloro-4,4-dimethyl-2,5-cyclohexadienone (4), a useful precursor for synthetic filicinic acid (5). was prepared in 88-94% yield by poly-chlorination of 4,4-dimethyl-2-cyclohexenone (1) or 4,4-dimethylcyclohexanone (11) with chlorine i
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 87:143-152
Reaction of the monomethyl enol ethers of 3-chloro-2,4-pentanedione and 2-chloro-1-phenyl-1,3-butanedione with sodium methoxide in methanol gave hydroxy enol ethers, respectively 3-hydroxy-2,4,4-trimethoxy-1-pentene and 3-hydroxy-2,4,4-trimethoxy-4-p
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 88:695-717
Autor:
Carine De Lepeleire, Laurent De Buyck
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 99:553-558
Tetrahydrofuran was chlorinated in the presence of N,N-dimethyloctylamine (1 mmol per mol optimal) with an excess of sulfuryl chloride at 55-80°C. After a first stage producing trans 2,3-trichloro THF (1) the reaction proceeded to complete conversio
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 88:719-735
1-Aryl-2,2-dichloro-1-alkanones were shown to rearrange with methyl magnesium iodide in ether under reflux into highly sterically hindered alkohols. The mechanism proceeds by a pseudo pinacol type rearrangement of the initially formed carbonyl adduct
Autor:
Peter Vanhulle, Laurent De Buyck
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 101:329-336
Preferable routes to the 2-hydroxyderivatives 7 resp. 8 of 2,3,3-trichloro THP (1) or 2,3,3-trichloro THP (2) involve the uncatalyzed methanolysis of the corresponding 2-formates or 2-acetates. These activated esters were rapidly formed from 1 or 2 i
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 86:663-673
Treatment of N-1-(2-chloro-2-methylpropylidene) amines with potassium cyanate in methanol afforded 1-substituted-4-methoxy-5,5-dimethyl-2-imidazolidinones, which were easily converted into the non-methoxylated derivatives, i.e. 1-substituted-5,5-dime
On the mechanism of the rearrangement of N-aryl α,α-dichloroketimines with lithium aluminium hydride
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 92:233-239
Experimental evidence is provided that the rearrangement of N-aryl α,α-dichloroketimines with lithium aluminium hydride in ether, observed as a competitive reaction during the stereospecific synthesis of cis-aziridines, proceeds via consecutive tra