3297-69-6Relevant academic research and scientific papers
Thioformamide derivatives
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, (2008/06/13)
Thioformamide derivatives of formula (I): STR1 wherein R represents alkyl; A represents optionally substituted pyrid-4-yl; Y represents ethylene or methylene or a direct bond and X represents an optionally substituted phenyl, pyridyl, furyl or thienyl gro
REGIOCHEMICAL CONTROL IN THE ALLYLIC HYDROGEN ABSTRACTION FROM 1-X-SUBSTITUTED CYCLOHEXENES
Bernardi, Rosanna,Caronna, Tullio,Coggiola, Dianella
, p. 5019 - 5022 (2007/10/02)
Allylic hydrogen abstraction is strongly affected by substituents attached to the double bond.Evidence regarding this regiochemical control is presented for the first time.
REGIOSELECTIVE SYNTHESIS OF 4-(2-OXOALKYL)PYRIDINES VIA 1,4-DIHYDROPYRIDINE DERIVATIVES USING SILYL ENOL ETHERS AND PYRIDINIUM SALTS
Akiba, Kin-ya,Nishihara, Yoshihiro,Wada, Makoto
, p. 5269 - 5272 (2007/10/02)
Trimethylsilyl enol ethers (1) reacted with 1-ethoxycarbonylpyridinium chloride (3) at 4-position with high regioselectivity to afford 1-ethoxycarbonyl-4-(2-oxoalkyl)-1,4-dihydropyridines (4) in 42-87percent yields.When 2,2,2-trichloroethyl chloroformate
Synthetic Applications of N-N Linked Heterocycles. Part 8. Regiospecific Synthesis of 4-(α-Acylalkyl)pyridines by Attack of Lithium Enolates of Ketones γ to N-(2,6-Dimethyl-4-oxopyridin-1-yl)pyridinium Salts
Lee, Cheuk Man,Sammes, Michael P.,Katritzky, Alan R.
, p. 2458 - 2462 (2007/10/02)
The addition of N-(2,6-dimethyl-4-oxopyridin-1-yl)pyridinium salts (2) - (4) to lithium enolates (1) of ketones in tetrahydrofuran at low temperatures gives regiospecifically high yields of 1,4-dihydro-adducts (5) - (7).These are readily isolated and can be decomposed under free-radical conditions, also in high yield, to 4-(α-acylalkyl)pyridines (8) - (10).Unsymmetrical dialkyl ketones give a mixture of two isomeric products, the ratio depending upon reaction conditions and steric factors. αβ-Unsaturated ketones, however, give products resulting from reaction exclusively at the position α' to the carbonyl group.
