Acetylenedicarboxylates undergo trans-addition of tetraalkoxydiboron in THF at 60 °C in the presence of 4,4′-bipyridine (5 mol %) as a catalyst to give 2,3-diborylfumarates in good yields with high stereoselectivity.
Accelerated synthesis of dendrimers by thermal azide–alkyne cycloaddition with internal alkynes
作者:Sandra P. Amaral、Juan Correa、Eduardo Fernandez-Megia
DOI:10.1039/d2gc00473a
日期:——
An accelerated synthesis of dendrimers is presented by combining the thermal azide–alkyne cycloaddition (AAC) and azide substitution reactions. The strategy is among the most user-friendly, flexible, modular, and accelerated strategies for the synthesis of dendrimers. Despite AAC being an archetypal click reaction that proceeds with complete atom-economy and is amenable to a high chemical diversity