The Selective Claisen and Dieckmann Ester Condensations Promoted by Dichlorobis(trifluoromethanesulfonato)titanium(IV)
作者:Yoo Tanabe
DOI:10.1246/bcsj.62.1917
日期:1989.6
Inter and intramolecularcondensations (the Claisen and the Dieckmann condensations) between ester functions have been performed by the combined use of dichlorobis(trifluoromethanesulfonato)titanium(IV) (= dichlorobis(triflato)titanium(IV)) and tertiary amine under mild reaction conditions. These results led to the development of the selective (crossed) Claisen and Dieckmann estercondensation between
Functional Group Transformations of Diols, Cyclic Ethers, and Lactones Using Aqueous Hydrobromic Acid and Phase Transfer Catalyst under Microwave Irradiation
作者:Goverdhan L. Kad、Irvinder Kaur、Monica Bhandari、Jasvinder Singh、Jasamrit Kaur
DOI:10.1021/op025606h
日期:2003.5.1
Synthesis of bromoalkanols has been achieved from diols, ethers, and lactones using aq HBr (48%) and tetrabutylammonium iodide/bromide as phase transfer catalyst under microwave irradiation. This environmentally benign route provides enhanced yields of products and does away with the use of benzene as compared to existing conventional methods.
Fittig; Mackenzie, Justus Liebigs Annalen der Chemie, 1894, vol. 283, p. 97
作者:Fittig、Mackenzie
DOI:——
日期:——
Gaubert; Linstead; Rydon, Journal of the Chemical Society, 1937, p. 1977