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
Synthesis of Optically Active 1,4-Dioxane Nucleotide Analogs
作者:Qiang Yu、Stefanie Kaffarnik、Per Carlsen
DOI:10.1080/00397910802326513
日期:2008.11.3
Abstract Opticallyactive nucleotide analogs were prepared that were composed of a 1,4-dioxane ring as the sugar analog to which either uracil or adenine attached together with two carboxylic ester groups, to be used as vehicles for formation of oligomers. The chiral 1,4-dioxane moiety was constructed from dimethyl L-tartrate via the corresponding (2R,3R)-dimethyl 2-O-allyl-tartrate.
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.