Selective Conversion of Diallylanilines and Arylimines to Quinolines
摘要:
A variety of diallylanilines are shown to undergo cobalt-carbonyl catalyzed rearrangement to quinolines. Diallylanilines are also used as allyl transfer reagents to convert benzaldimines into quinolines. Substitution in the 2- and 3-positions of the quinoline is featured in all transformations.
SnCl2 mediated efficient N,N-dialkylation of azides to tertiary-amine via potential stannaimine intermediate
摘要:
A base free one-pot conversion of azides to N,N-dialkylamine is described. A two-step reaction pathway has been postulated invoking the intermediacy of stannaimine. This new carbon-nitrogen bond formation strategy adds to the repertoire of tin(II) chemistry. (c) 2005 Elsevier B.V. All rights reserved.
Condensation of alkyl allyl (and 3-methyl-3-butenyl) phosphorochloridates with dialkyl phosphates gave trialkyl allyl (and 3-methyl-3-butenyl) pyrophosphates. Reactions of crotyl (2-butenyl) pyrophosphates with various nucleophiles such as phenolic ethers, aromatic amines, and nitrogen-containing heterocycles in the presence of boron trifluoride etherate gave good to moderate yields of crotylated products. The
Palladium-catalyzedcarbonylation of allylamines under CO (50atm) at 110°C proceeds highly efficiently to give the corresponding β,γ-unsaturated amides. The carbonylation occurs at the less substituted carbon of allyl units to give linear amides with high regioselectivity. The reaction can be rationalized by assuming the mechanism which involves oxidative addition of palladium (0) species to allylamines
Carbonylation of allylamines proceeds smoothly in the presence of a palladium–phosphine catalyst to give β,γ-unsaturated amides in good yields.
在钯-膦催化剂的存在下,烯丙胺的羰基化反应平稳进行,从而以高收率得到β,γ-不饱和酰胺。
New Experiments in the Reductive N-Alkylation and N-Peralkylation of Aromatic Amines
作者:G. Verardo、A. G. Giumanini、P. Strazzolini
DOI:10.1080/00397919408012638
日期:1994.3
Some secondary and primary aromatic amines were variously N-alkylated and N-peralkylated by the aldehyde-sodium borohydride procedure in acidic aqueous solution. The procedure lends itself to the alpha-mono and alpha,alpha'-dideuterium labelling of the new N-substituent(s).
Murahashi Shun-Ichi, Imada Yasushi, Nishimura Koichi, Tetrahedron, 50 (1994) N 2, S 453-464