A two-step reaction sequence starting with the indium-mediatedallenylation of aldehydes with 4-bromo-2-butyn-1-ols and subsequent ozonolysis of the resulting allenylic product was developed to generate a variety of dihydroxyacetone derivatives. The regioselectivity of the indium-promoted C–C bond-forming reaction can be manipulated through hydroxy protecting groups on 4-bromo-2-butyn-1-ol, yielding
作者:Karla Janardhan Reddy、Tapan Kumar Kuilya、Jin Kun Cha
DOI:10.1021/acs.orglett.2c02258
日期:2022.9.2
homoallylation of aldehydes was achieved by the Ti–O temporary linker strategy. Propargylic and allylic alcohol derivatives were employed as convenient pronucleophiles, obviating prefabrication of propargylation/allylationreagents. It was surprising that 1,6-diastereoselectivity was affected by not only the Grignardreagent but also the reaction solvent.