Substituted diether diols by ring-opening of carbocyclic and stannylene acetals
作者:Rolando Martínez-Bernhardt、Peter P. Castro、Gayane Godjoian、Carlos G. Gutiérrez
DOI:10.1016/s0040-4020(98)00563-8
日期:1998.7
Reduction of malonaldehyde bis(ethylene and propylene acetals) with borane or monochloroborane produces diether diols 1 and 2 in high yield. Similar reduction of glyoxal bis(ethylene acetals) has only limited utility for the preparation of tetrasubstituted triethyleneglycols 3. Organotin chemistry is complementary: stannylene acetals prepared from disubstituted vicinal diols can be alkylated with half
Substituted triethylene glycols from dibutylstannylene acetals
作者:Gayane Godjoian、Vivian R Wang、Alfredo M Ayala、Ruben V Martínez、Rolando Martínez-Bernhardt、Carlos G Gutiérrez
DOI:10.1016/0040-4039(95)02211-2
日期:1996.1
Stannylene acetals prepared from disubstituted vicinal diols can be alkylated with a half equivalent of 1,2-dibromoethane to produce tetrasubstituted triethyleneglycols 2, or with two equivalents of 2-chloroethanol to produce disubstituted triethyleneglycols 1.