N-heterocyclic carbene catalyzed cyclization cascades of 3-halopropenals and arylnitroso compounds to 2,3-disubstituted isoxazol-5(2 H)-ones
An NHC-catalyzed annulation reaction of 3-halopropenals with nitrosobenzene derivatives, providing access to 2,3-disubstituted isoxazol-5(2H)-ones under mild conditions is described. This procedure represents a metal-free approach to the alternative equiv
Yao, Weijun,Bian, Ming,Wang, Gang,Ma, Cheng
supporting information; experimental part
p. 1998 - 2002
(2011/08/05)
Synthesis and characterization of α,β-unsaturated hydroximoyl chlorides and hydroximates
New α,β-unsaturated hydroximoyl chlorides (PhC(Cl)≤CHC(Cl) ≤NOCH3) and hydroximates (PhC(OCH3)≤CHC(OCH 3)≤NOCH3) were prepared. The ZZ-isomer of PhC(Cl)≤CHC(Cl)≤NOCH3 was prepared in four steps from e
Johnson, James E.,Lu, Ling,Dai, Houquan,Canseco, Diana C.,Small, Krista M.,Dolliver, Debra D.,Fronczek, Frank R.
p. 439 - 444
(2007/10/03)
Hydrochlorination of 2,3-acetylenic acids with thionyl chloride in dimethylformamide
The reaction of 2,3-acetylenic acids (1a-d) with thionyl chloride in DMF under mild conditions gave E,Z-3-chloro-2-alkenoic acids (2a-d) or esters (3a-d) depending on treating the reaction mixture with either water or alcohols.
Urdaneta, Neudo A.,Herrera, Julio C.,Salazar, Jose,Lopez, Simon E.
p. 3003 - 3009
(2007/10/03)
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