Substituted coumarins as ambident nucleophiles in one-pot hydrogenation/alkylation reaction
作者:Nevena I. Petkova-Yankova、Rositca D. Nikolova
DOI:10.1007/s11696-020-01098-1
日期:2020.8
The regioselectivity of a one-pot hydrogenation/alkylation reaction of coumarins 1a and 1b with series of alkyl halides has been elucidated as a complementary work to reaction of acylation with the same coumarins. Reaction conditions have provided formation of only C-alkylation products with good to high yield. The results from the experiments are of significant importance to predict reactivity of
Hydrogenation/Regioselective C‐Acylation Reaction of Diethyl Coumarin‐3‐phosphonate With NaBH<sub>4</sub>/Acid Anhydrides: A New One‐Pot Tandem Reaction
作者:Nevena I. Petkova、Rositca D. Nikolova、Anka G. Bojilova、Nestor A. Rodios、C. P. Raptopoulou
DOI:10.1080/00397910500385167
日期:2006.3.1
The one‐pot tandem reaction of diethyl coumarin‐3‐phosphonate 1 with a mixture of sodium borohydride/acid anhydrides gives mainly the corresponding hydrogenation/acylation product of diethyl 3‐acyl‐2‐oxochroman‐3‐ylphosphonates 3a–d in good yields. Different experimental conditions have been examined to get the best yields of the reaction products. From this reaction the hydrogenation product of diethyl