Synthesis of Arylallenes by Palladium-Catalyzed Retro-Propargylation of Homopropargyl Alcohols
摘要:
Treatment of tertiary homopropargyl alcohol with aryl halide under palladium catalysis provided arylallenes regioselectively. The reaction includes retropropargylation, which proceeds in a concerted fashion via a cyclic transition state and transfers the stereochemistry of homopropargyl alcohols through C-C bond cleavage. The present method enables the use of homopropargyl alcohols as allenylmetal equivalents.
Iron-Catalyzed Coupling of Propargyl Bromides and Alkyl Grignard Reagents
作者:Pablo Domingo-Legarda、Rita Soler-Yanes、M. Teresa Quirós-López、Elena Buñuel、Diego J. Cárdenas
DOI:10.1002/ejoc.201800849
日期:2018.9.23
An iron‐catalyzed cross‐coupling reaction of propargyl bromides with alkylmagnesium reagents affords either allene‐ or propargyl‐coupled products in smooth conditions, and tolerates the presence of functional groups.