Synthesis of New Lipophilic Cyclopentafullerenes from Long-Chain
Alka-2,3-dienoates
摘要:
Long-chain alka-2,3-dienoates were synthesized via the Wittig reaction from the corresponding fatty acids, and the subsequent triphenylphosphine-catalyzed [3+2]-cycloaddition to fullerene C(60)afforded new lipophilic cyclopentafullerenes.
N-Heterocyclic Carbene-Catalyzed Internal Redox Reaction of Alkynals: An Efficient Synthesis of Allenoates
摘要:
An efficient N-heterocyclic carbene (NHC)-catalyzed internal redox reaction of alkynals that bear a y leaving group has been developed. This process provides a new access to a range of allenoates in good yields. Preliminary results demonstrate that the enantioselective variant can also be achieved.