Conversion of epoxides to bromohydrins by B-bromobis (dimethylamino) borane
作者:Thonas W. Bell、James A. Ciaccio
DOI:10.1016/s0040-4039(00)84111-8
日期:1986.1
Reaction of the title reagent with 1-alkene oxides regioselectively yields the corresponding 1-bromo-2-alkanols, while the more substituted bromide predominates in the cases of styrene oxide and 1-methylcyclohexene oxide.
Synthesis of Vicinal Dichlorides via Activation of Aliphatic Terminal Epoxides with Triphosgene and Pyridine
作者:Alexander H. Cleveland、Frank R. Fronczek、Rendy Kartika
DOI:10.1021/acs.joc.7b03197
日期:2018.3.16
Herein we report a novel synthetic reaction to convert unactivated terminal aliphatic epoxide to alkyl vicinal dichloride based on triphosgene–pyridine activation. Our methodology is operationally simple and readily tolerated by a broad of scope of substrates as well as protecting groups. Furthermore, these mild conditions generally yield clean reaction mixtures that are free of byproducts upon aqueous
A highly regioselective conversion of epoxides to halohydrins by lithium halides
作者:Joginder S. Bajwa、Robert C. Anderson
DOI:10.1016/0040-4039(91)80676-w
日期:1991.6
Lithiumhalides in the presence of an acid (pKa < 13) react with epoxides regioselectively to give vicinal halohydrins in high yields The simplicity and convenience of this procedure makes it attractive for large scale synthesis.