1,2- vs 1,4-Addition of Acylbenzotriazoles to α,β-Unsaturated Aldehydes and Ketones. A Novel Route to 3-Alkyl-4,6-diaryl-3,4-dihydropyran-2-ones
作者:Alan R. Katritzky、Olga V. Denisko
DOI:10.1021/jo011082s
日期:2002.5.1
Lithiation of aliphatic 1-acylbenzotriazoles with subsequent reaction with alpha,beta-unsaturated ketones and aldehydes affords either 3,4,6-trisubstituted 3,4-dihydropyran-2-ones or 1,3-dienes depending on the carbonyl reagent used. Substituent effects on product yield and isomer ratio are discussed.
脂族1-酰基苯并三唑的锂化,然后与α,β-不饱和酮和醛反应,根据所用的羰基试剂,可得到3,4,6-三取代的3,4-二氢吡喃-2-酮或1,3-二烯。讨论了取代基对产物收率和异构体比率的影响。