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R. Zhou, J. Wang, H. Song and Z. He, “Phosphine-Catalyzed Cascade [3 + 2] Cyclization-Allylic Alkylation, [2 + 2 + 1] Annulation, and [3 + 2] Cyclization Reactions between Allylic Carbonates and Enones,” Organic Letters, Vol. 13, No. 4, 2011, pp. 580-583.
doi:10.1021/ol102738b
has been cited by the following article:
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TITLE:
Three-Component Coupling Catalyzed by Phosphine: Preparation of α-Amino γ-Oxo Acid Derivatives
AUTHORS:
Yohei Oe, Takeshi Inoue, Hiroaki Kishimoto, Mitsuhiro Sasaki, Tetsuo Ohta, Isao Furukawa
KEYWORDS:
Three-Component Coupling; Phosphine; 2-Amino-4-Oxocarboxylic Acid
JOURNAL NAME:
International Journal of Organic Chemistry,
Vol.2 No.2,
June
27,
2012
ABSTRACT: The three-component coupling reaction of ethyl propiolate (1), phthalimide (2), and aldehyde (3) catalyzed by tripheny- lphosphine, was developed. A solution of an equivalent amount of 1 and 2 in benzaldehyde (3a) in the presence of 30 mol% of PPh3 was heated at 100?C for 48 h to give N-(1-ethoxycarbonyl-3-oxo-3-phenylpropyl)phthalimide (4a) in 83% yield. This reaction was thought to proceed via vinylphosphonium salt formed from the reaction of ethyl propiolate (1) with triphenylphosphine in situ.