作者: Rolando Martínez-Bernhardt , Peter P. Castro , Gayane Godjoian , Carlos G. Gutiérrez
DOI: 10.1016/S0040-4020(98)00563-8
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摘要: Abstract Reduction of malonaldehyde bis(ethylene and propylene acetals) with borane or monochloroborane produces diether diols 1 2 in high yield. Similar reduction glyoxal has only limited utility for the preparation tetrasubstituted triethylene glycols 3. Organotin chemistry is complementary: stannylene acetals prepared from disubstituted vicinal can be alkylated half an equivalent 1,2-dibromoethane to produce 3, two equivalents 2-chloroethanol 4.