Diols obtained via chemo and regioselective ring opening of epoxy alcohols: a straightforward synthesis of 2S,3S-Octandiol
摘要:
Epoxy alcohols are regio and chemoselectively opened to the corresponding iodohydrins and then reduced in situ to diols; the application of the described procedure leads to a short asymmetric synthesis of a well known pheromone. Also homoallylic (E and Z) epoxy alcohols and its benzylated derivatives shows high preference for regioselective opening affording the corresponding 1,3 diol.
Ethyl Cyanoformate/Hydrogen Peroxide and Related Combination Systems, Novel Epoxidizing Systems of Olefins
作者:Yukio Masaki、Tsuyoshi Miura、Isao Mukai、Akichika Itoh、Hirohisa Oda
DOI:10.1246/cl.1991.1937
日期:1991.11
A combination system of ethyl cyanoformate and hydrogen peroxide was found to epoxidize olefins in a stereospecific manner at room temperature. Asymmetric epoxidation was observed with menthyl cyanoformate/hydrogen peroxide system.
Regiochemical control of the ring opening of 1,2-epoxides by means of chelating processes. Part 18: Regioselectivity of the opening reactions with MeOH of 1-(benzyloxy)-2,3- and -3,4-epoxyalkanes under condensed and gas phase operating conditions
作者:Paolo Crotti、Gabriele Renzi、Graziella Roselli、Valeria Di Bussolo、Laura Lucarelli、Maria Rosaria Romano
DOI:10.1016/j.tet.2005.05.040
日期:2005.8
The regiochemical behavior of a series of aliphatic open chain epoxides bearing a heterofunctionality in an allylic or homoallylic relationship has been examined in the opening reaction with MeOH under both condensed and gas phase operating conditions. The results indicate that the proton (actually D+) possesses in the gas phase intrinsic chelating properties which are even superior than those of Li (+) in the condensed phase. (c) 2005 Elsevier Ltd. All rights reserved.
Substituent-directed alkyl addition reactions of epoxides. 1. Applications to the synthesis of 3-hydroxy-4-methylalkanoic acids
作者:Lee A. Flippin、Peter A. Brown、Keyvan Jalali-Araghi
DOI:10.1021/jo00276a018
日期:1989.7
Diols obtained via chemo and regioselective ring opening of epoxy alcohols: a straightforward synthesis of 2S,3S-Octandiol
作者:Carlo Bonini、Giuliana Righi
DOI:10.1016/s0040-4020(01)92240-9
日期:1992.2
Epoxy alcohols are regio and chemoselectively opened to the corresponding iodohydrins and then reduced in situ to diols; the application of the described procedure leads to a short asymmetric synthesis of a well known pheromone. Also homoallylic (E and Z) epoxy alcohols and its benzylated derivatives shows high preference for regioselective opening affording the corresponding 1,3 diol.
Regiochemical control of the ring opening of 1:2-epoxides by means of chelating processes. 10. Synthesis and ring opening reactions of mono- and difunctionalized cis and trans aliphatic oxirane systems
The regiochemical outcome of the ring opening of 1:2-epoxides through chelation processes assisted by metal ions, was verified in mono- and difunctionalized aliphatic oxirane systems bearing the heterofunctionality (OR) in an homoallylic and/or allylic relationship to the oxirane ring. The effect of the distance of the OR functionality from the oxirane ring and of the type of protective group on the