102267-93-6Relevant articles and documents
Diels-Alder reactions of N-silyloxy 1-azadienes
Behforouz, Mohammad,Gu, Zhengxiang,Stelzer, Lindsay S.,Ahmadian, Mohammad,Haddad, Jalal,Scherschel, John A.
, p. 2211 - 2214 (1997)
Novel 1-(t-butyldimethyisilyloxy)-1-aza-1,3-butadienes 1 and 2 are prepared by the reaction of O-(t-butyldimethylsilyloxy)hydroxylamine with methyl vinyl ketone and methacrolein, respectively. Azadienes 1 and 2 through sharing of oxygen nonbonding electrons are activated and thus their Diels-Alder reactions with a number of halobenzoquinones, napthoquinones and N-phenylmaleimide regiospecifically give low to good yields of various pyridine heterocycles.
Process for the preparation of 2,3-pyridinedicarboximides
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, (2008/06/13)
There is provided a process for the preparation of 2,3-pyridinedicarboximides having the structural formula I The 2,3-pyridinedicarboximides are useful as intermediates in the preparation of herbicidal 2-(2-imidazolin-2-yl)nicotinic acids,
Diels-Alder cycloaddition reactions of αβ-unsaturated aldehyde acylhydrazones
Allcock,Gilchrist,King
, p. 125 - 128 (2007/10/02)
Acylhydrazones derived from N-methyl-N-pent-4-enoylhydrazine or N-methyl-N-pent-4-ynoylhydrazine and αβ-unsaturated aldehydes undergo intramolecular Diels-Aldler reactions at elevated temperatures. An intermolecular counterpart, the addition of methacrole