Iron-Catalyzed Cross-Coupling of 1-Alkynylcyclopropyl Tosylates and Related Substrates
作者:Daniel J. Tindall、Helga Krause、Alois Fürstner
DOI:10.1002/adsc.201600357
日期:2016.7.28
1‐Alkynylcyclopropyl tosylates react with alkylmagnesium halides in the presence of catalytic ferric acetylacetonate [Fe(acac)3] under net propargylic substitution; allene formation, which is the prevalent reactivity mode of propargylic substrates otherwise, was noticed as a side reaction only when branched alkyl‐ or aryl‐Grignard reagents were used. These transformations represent the first successful iron‐catalyzed
Acid- and Pd(0)-Catalyzed Ring Opening of 1-(1-Cycloalkenyl)cyclopropyl Sulfonates
作者:Long Guo Quan、Hyung Goo Lee、Jin Kun Cha
DOI:10.1021/ol701653x
日期:2007.10.1
isomerization of 1-(1'-cycloalkenyl)cyclopropyl sulfonates under mild conditions. The remarkable ease of ringopening is attributed to the presence of a 1'-alkyl substituent. Also included is a palladium-catalyzed ringopening reaction of 1-(1'-cycloalkenyl)cyclopropyl tosylates for convenientpreparation of substituted 1,3-dienylamines, which complements previously reported nucleophilic substitution reactions