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 triethylene glycols 3. Organotin chemistry is complementary: stannylene acetals prepared from disubstituted vicinal diols can be alkylated with half
用硼烷或一氯硼烷还原丙二醛双(乙烯和丙烯缩醛)可以高收率生产二醚二醇1和2。乙二醛双(乙缩醛)的类似还原仅有限地用于制备四取代的三乙二醇3。有机锡化学是互补的:由二取代邻位二醇制得的亚锡乙缩醛可以与一半当量的1,2-二溴乙烷烷基化以生产四取代三乙二醇3,或与两当量的2-氯乙醇烷基化以生产二取代三乙二醇4。